256237892120 has 128 divisors (see below), whose sum is σ = 662974709760. Its totient is φ = 87310379520.

The previous prime is 256237892101. The next prime is 256237892143. The reversal of 256237892120 is 21298732652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64590377 + ... + 64594343.

It is an arithmetic number, because the mean of its divisors is an integer number (5179489920).

Almost surely, 2^256237892120 is an apocalyptic number.

256237892120 is a gapful number since it is divisible by the number (20) 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 256237892120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331487354880).

256237892120 is an abundant number, since it is smaller than the sum of its proper divisors (406736817640).

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

256237892120 is a wasteful number, since it uses less digits than its factorization.

256237892120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353 (or 5349 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 256237892120 in words is "two hundred fifty-six billion, two hundred thirty-seven million, eight hundred ninety-two thousand, one hundred twenty".