256625520672 has 48 divisors (see below), whose sum is σ = 673762707072. Its totient is φ = 85526511360.

The previous prime is 256625520649. The next prime is 256625520673. The reversal of 256625520672 is 276025526652.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (256625520673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305422 + ... + 778802.

It is an arithmetic number, because the mean of its divisors is an integer number (14036723064).

Almost surely, 2^256625520672 is an apocalyptic number.

It is an amenable number.

256625520672 is an abundant number, since it is smaller than the sum of its proper divisors (417137186400).

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

256625520672 is a wasteful number, since it uses less digits than its factorization.

256625520672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479041 (or 479033 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 256625520672 in words is "two hundred fifty-six billion, six hundred twenty-five million, five hundred twenty thousand, six hundred seventy-two".