256451137407 has 6 divisors (see below), whose sum is σ = 370429420712. Its totient is φ = 170967424932.

The previous prime is 256451137399. The next prime is 256451137409. The reversal of 256451137407 is 704731154652.

256451137407 is a `hidden beast` number, since 2 + 5 + 64 + 51 + 137 + 407 = 666.

It is not a de Polignac number, because 256451137407 - 2³ = 256451137399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256451137409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14247285403 + ... + 14247285420.

Almost surely, 2^256451137407 is an apocalyptic number.

256451137407 is a deficient number, since it is larger than the sum of its proper divisors (113978283305).

256451137407 is a wasteful number, since it uses less digits than its factorization.

256451137407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28494570829 (or 28494570826 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 256451137407 in words is "two hundred fifty-six billion, four hundred fifty-one million, one hundred thirty-seven thousand, four hundred seven".