256334525400645 has 64 divisors (see below), whose sum is σ = 459311349657600. Its totient is φ = 135630665501760.

The previous prime is 256334525400559. The next prime is 256334525400719. The reversal of 256334525400645 is 546004525433652.

256334525400645 is a `hidden beast` number, since 2 + 5 + 6 + 3 + 3 + 4 + 52 + 540 + 0 + 6 + 45 = 666.

It is not a de Polignac number, because 256334525400645 - 2¹¹ = 256334525398597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256334525400591 and 256334525400600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62072416 + ... + 66073094.

It is an arithmetic number, because the mean of its divisors is an integer number (7176739838400).

Almost surely, 2^{256334525400645} is an apocalyptic number.

It is an amenable number.

256334525400645 is a deficient number, since it is larger than the sum of its proper divisors (202976824256955).

256334525400645 is a wasteful number, since it uses less digits than its factorization.

256334525400645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004447 (or 4004441 counting only the distinct ones).

The product of its (nonzero) digits is 51840000, while the sum is 54.

The spelling of 256334525400645 in words is "two hundred fifty-six trillion, three hundred thirty-four billion, five hundred twenty-five million, four hundred thousand, six hundred forty-five".