256452615 has 64 divisors (see below), whose sum is σ = 474439680. Its totient is φ = 131293440.

The previous prime is 256452613. The next prime is 256452631. The reversal of 256452615 is 516254652.

256452615 is a `hidden beast` number, since 2 + 5 + 645 + 2 + 6 + 1 + 5 = 666.

It is not a de Polignac number, because 256452615 - 2¹ = 256452613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256452615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256452611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 974974 + ... + 975236.

It is an arithmetic number, because the mean of its divisors is an integer number (7413120).

Almost surely, 2^256452615 is an apocalyptic number.

256452615 is a deficient number, since it is larger than the sum of its proper divisors (217987065).

256452615 is a wasteful number, since it uses less digits than its factorization.

256452615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 535 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 256452615 is about 16014.1379724292. The cubic root of 256452615 is about 635.3344095950.

The spelling of 256452615 in words is "two hundred fifty-six million, four hundred fifty-two thousand, six hundred fifteen".