256672300557 has 16 divisors (see below), whose sum is σ = 363804581952. Its totient is φ = 160407648000.

The previous prime is 256672300483. The next prime is 256672300571. The reversal of 256672300557 is 755003276652.

It is a happy number.

It is not a de Polignac number, because 256672300557 - 2⁸ = 256672300301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256672300457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10012678 + ... + 10038279.

It is an arithmetic number, because the mean of its divisors is an integer number (22737786372).

Almost surely, 2^256672300557 is an apocalyptic number.

It is an amenable number.

256672300557 is a deficient number, since it is larger than the sum of its proper divisors (107132281395).

256672300557 is a wasteful number, since it uses less digits than its factorization.

256672300557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20051228.

The product of its (nonzero) digits is 2646000, while the sum is 48.

The spelling of 256672300557 in words is "two hundred fifty-six billion, six hundred seventy-two million, three hundred thousand, five hundred fifty-seven".