256233241560 has 128 divisors (see below), whose sum is σ = 802305492480. Its totient is φ = 65343049728.

The previous prime is 256233241543. The next prime is 256233241597. The reversal of 256233241560 is 65142332652.

It is a super-2 number, since 2×256233241560² (a number of 24 digits) contains 22 as substring.

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, 16864287 + ... + 16879473.

It is an arithmetic number, because the mean of its divisors is an integer number (6268011660).

Almost surely, 2^256233241560 is an apocalyptic number.

256233241560 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 256233241560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401152746240).

256233241560 is an abundant number, since it is smaller than the sum of its proper divisors (546072250920).

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

256233241560 is a wasteful number, since it uses less digits than its factorization.

256233241560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21337 (or 21333 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 256233241560 in words is "two hundred fifty-six billion, two hundred thirty-three million, two hundred forty-one thousand, five hundred sixty".