256374551537 has 16 divisors (see below), whose sum is σ = 276485371008. Its totient is φ = 236319638400.

The previous prime is 256374551527. The next prime is 256374551551. The reversal of 256374551537 is 735155473652.

It is a cyclic number.

It is not a de Polignac number, because 256374551537 - 2¹² = 256374547441 is a prime.

It is a Duffinian number.

Its product of digits (13230000) is a multiple of the sum of its prime divisors (9800).

It is not an unprimeable number, because it can be changed into a prime (256374551527) 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, 50754662 + ... + 50759712.

It is an arithmetic number, because the mean of its divisors is an integer number (17280335688).

Almost surely, 2^256374551537 is an apocalyptic number.

It is an amenable number.

256374551537 is a deficient number, since it is larger than the sum of its proper divisors (20110819471).

256374551537 is a wasteful number, since it uses less digits than its factorization.

256374551537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9800.

The product of its digits is 13230000, while the sum is 53.

The spelling of 256374551537 in words is "two hundred fifty-six billion, three hundred seventy-four million, five hundred fifty-one thousand, five hundred thirty-seven".