256740527956 has 24 divisors (see below), whose sum is σ = 503388065376. Its totient is φ = 113546178720.

The previous prime is 256740527951. The next prime is 256740527963. The reversal of 256740527956 is 659725047652.

It is a self number, because there is not a number n which added to its sum of digits gives 256740527956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256740527951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78849886 + ... + 78853141.

It is an arithmetic number, because the mean of its divisors is an integer number (20974502724).

Almost surely, 2^256740527956 is an apocalyptic number.

It is an amenable number.

256740527956 is a deficient number, since it is larger than the sum of its proper divisors (246647537420).

256740527956 is a wasteful number, since it uses less digits than its factorization.

256740527956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157703079 (or 157703077 counting only the distinct ones).

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

The spelling of 256740527956 in words is "two hundred fifty-six billion, seven hundred forty million, five hundred twenty-seven thousand, nine hundred fifty-six".