1954405648800 has 1296 divisors, whose sum is σ = 8271114677280. Its totient is φ = 448756070400.

The previous prime is 1954405648799. The next prime is 1954405648801. The reversal of 1954405648800 is 88465044591.

1954405648800 is a `hidden beast` number, since 1 + 9 + 544 + 0 + 56 + 48 + 8 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1954405648799) and next prime (1954405648801).

It is a tau number, because it is divible by the number of its divisors (1296).

It is a super-2 number, since 2×1954405648800² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1954405648801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 446923414 + ... + 446927786.

It is an arithmetic number, because the mean of its divisors is an integer number (6382032930).

Almost surely, 2^{1954405648800} is an apocalyptic number.

1954405648800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1954405648800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4135557338640).

1954405648800 is an abundant number, since it is smaller than the sum of its proper divisors (6316709028480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1954405648800 is a wasteful number, since it uses less digits than its factorization.

1954405648800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449 (or 4413 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 1954405648800 in words is "one trillion, nine hundred fifty-four billion, four hundred five million, six hundred forty-eight thousand, eight hundred".