256020972502 has 24 divisors (see below), whose sum is σ = 408101731200. Its totient is φ = 120435757440.

The previous prime is 256020972497. The next prime is 256020972517. The reversal of 256020972502 is 205279020652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1503499 + ... + 1665097.

It is an arithmetic number, because the mean of its divisors is an integer number (17004238800).

Almost surely, 2^256020972502 is an apocalyptic number.

256020972502 is a deficient number, since it is larger than the sum of its proper divisors (152080758698).

256020972502 is a wasteful number, since it uses less digits than its factorization.

256020972502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164376 (or 164359 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 256020972502 in words is "two hundred fifty-six billion, twenty million, nine hundred seventy-two thousand, five hundred two".