1553746803840 has 2048 divisors, whose sum is σ = 7159283712000. Its totient is φ = 309049344000.

The previous prime is 1553746803823. The next prime is 1553746803841. The reversal of 1553746803840 is 483086473551.

1553746803840 is a `hidden beast` number, since 1 + 5 + 537 + 4 + 68 + 0 + 3 + 8 + 40 = 666.

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 (1553746803841) by changing a digit.

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 255 ways as a sum of consecutive naturals, for example, 5733382905 + ... + 5733383175.

It is an arithmetic number, because the mean of its divisors is an integer number (3495744000).

Almost surely, 2^{1553746803840} is an apocalyptic number.

1553746803840 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 1553746803840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3579641856000).

1553746803840 is an abundant number, since it is smaller than the sum of its proper divisors (5605536908160).

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

1553746803840 is a wasteful number, since it uses less digits than its factorization.

1553746803840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 1553746803840 in words is "one trillion, five hundred fifty-three billion, seven hundred forty-six million, eight hundred three thousand, eight hundred forty".