256525377570 has 192 divisors, whose sum is σ = 862340484096. Its totient is φ = 53303935680.

The previous prime is 256525377553. The next prime is 256525377583. The reversal of 256525377570 is 75773525652.

256525377570 is a `hidden beast` number, since 2 + 5 + 6 + 52 + 537 + 7 + 57 + 0 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 498384 + ... + 872603.

It is an arithmetic number, because the mean of its divisors is an integer number (4491356688).

Almost surely, 2^256525377570 is an apocalyptic number.

256525377570 is an abundant number, since it is smaller than the sum of its proper divisors (605815106526).

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

256525377570 is a wasteful number, since it uses less digits than its factorization.

256525377570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371027 (or 1371015 counting only the distinct ones).

The product of its (nonzero) digits is 15435000, while the sum is 54.

The spelling of 256525377570 in words is "two hundred fifty-six billion, five hundred twenty-five million, three hundred seventy-seven thousand, five hundred seventy".