1669310078400 has 504 divisors, whose sum is σ = 6168153962880. Its totient is φ = 444043607040.

The previous prime is 1669310078383. The next prime is 1669310078431. The reversal of 1669310078400 is 48700139661.

It is a happy number.

1669310078400 is a `hidden beast` number, since 16 + 69 + 3 + 100 + 78 + 400 = 666.

It is a super-2 number, since 2×1669310078400² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 162902077 + ... + 162912323.

It is an arithmetic number, because the mean of its divisors is an integer number (12238400720).

Almost surely, 2^{1669310078400} is an apocalyptic number.

1669310078400 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 1669310078400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3084076981440).

1669310078400 is an abundant number, since it is smaller than the sum of its proper divisors (4498843884480).

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

1669310078400 is a wasteful number, since it uses less digits than its factorization.

1669310078400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10703 (or 10676 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 1669310078400 in words is "one trillion, six hundred sixty-nine billion, three hundred ten million, seventy-eight thousand, four hundred".