155731832256 has 672 divisors, whose sum is σ = 586909550080. Its totient is φ = 35364003840.

The previous prime is 155731832239. The next prime is 155731832261. The reversal of 155731832256 is 652238137551.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40166190 + ... + 40170066.

Almost surely, 2^155731832256 is an apocalyptic number.

155731832256 is a gapful number since it is divisible by the number (16) 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 155731832256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293454775040).

155731832256 is an abundant number, since it is smaller than the sum of its proper divisors (431177717824).

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

155731832256 is a wasteful number, since it uses less digits than its factorization.

155731832256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953 (or 3932 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 48.

It can be divided in two parts, 1557 and 31832256, that added together give a palindrome (31833813).

The spelling of 155731832256 in words is "one hundred fifty-five billion, seven hundred thirty-one million, eight hundred thirty-two thousand, two hundred fifty-six".