256523216701756 has 12 divisors (see below), whose sum is σ = 453543625406368. Its totient is φ = 126939323728512.

The previous prime is 256523216701753. The next prime is 256523216701771. The reversal of 256523216701756 is 657107612325652.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 256523216701756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256523216701751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330571155156 + ... + 330571155931.

Almost surely, 2^{256523216701756} is an apocalyptic number.

It is an amenable number.

256523216701756 is a deficient number, since it is larger than the sum of its proper divisors (197020408704612).

256523216701756 is a wasteful number, since it uses less digits than its factorization.

256523216701756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661142311188 (or 661142311186 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 58.

The spelling of 256523216701756 in words is "two hundred fifty-six trillion, five hundred twenty-three billion, two hundred sixteen million, seven hundred one thousand, seven hundred fifty-six".