256372615 has 16 divisors (see below), whose sum is σ = 319956480. Its totient is φ = 196967680.

The previous prime is 256372601. The next prime is 256372637. The reversal of 256372615 is 516273652.

It is not a de Polignac number, because 256372615 - 2¹¹ = 256370567 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23067 + ... + 32323.

It is an arithmetic number, because the mean of its divisors is an integer number (19997280).

Almost surely, 2^256372615 is an apocalyptic number.

256372615 is a deficient number, since it is larger than the sum of its proper divisors (63583865).

256372615 is a wasteful number, since it uses less digits than its factorization.

256372615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9482.

The product of its digits is 75600, while the sum is 37.

The square root of 256372615 is about 16011.6399847111. The cubic root of 256372615 is about 635.2683388594.

The spelling of 256372615 in words is "two hundred fifty-six million, three hundred seventy-two thousand, six hundred fifteen".