256669000260 has 96 divisors (see below), whose sum is σ = 723793795200. Its totient is φ = 67957773312.

The previous prime is 256669000171. The next prime is 256669000309. The reversal of 256669000260 is 62000966652.

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, 30686839 + ... + 30695201.

It is an arithmetic number, because the mean of its divisors is an integer number (7539518700).

Almost surely, 2^256669000260 is an apocalyptic number.

256669000260 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 256669000260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361896897600).

256669000260 is an abundant number, since it is smaller than the sum of its proper divisors (467124794940).

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

256669000260 is a wasteful number, since it uses less digits than its factorization.

256669000260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11957 (or 11955 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 256669000260 in words is "two hundred fifty-six billion, six hundred sixty-nine million, two hundred sixty", and thus it is an aban number.