256376228102520 has 64 divisors (see below), whose sum is σ = 769160645475840. Its totient is φ = 68364153168000.

The previous prime is 256376228102417. The next prime is 256376228102557. The reversal of 256376228102520 is 25201822673652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41489956 + ... + 47266995.

It is an arithmetic number, because the mean of its divisors is an integer number (12018135085560).

Almost surely, 2^{256376228102520} is an apocalyptic number.

256376228102520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256376228102520 is an abundant number, since it is smaller than the sum of its proper divisors (512784417373320).

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

256376228102520 is a wasteful number, since it uses less digits than its factorization.

256376228102520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88781036 (or 88781032 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 256376228102520 in words is "two hundred fifty-six trillion, three hundred seventy-six billion, two hundred twenty-eight million, one hundred two thousand, five hundred twenty".