256265663415 has 16 divisors (see below), whose sum is σ = 410881075200. Its totient is φ = 136389682592.

The previous prime is 256265663383. The next prime is 256265663491. The reversal of 256265663415 is 514366562652.

It is a cyclic number.

It is not a de Polignac number, because 256265663415 - 2⁵ = 256265663383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17826195 + ... + 17840564.

It is an arithmetic number, because the mean of its divisors is an integer number (25680067200).

Almost surely, 2^256265663415 is an apocalyptic number.

256265663415 is a deficient number, since it is larger than the sum of its proper divisors (154615411785).

256265663415 is a wasteful number, since it uses less digits than its factorization.

256265663415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35667246.

The product of its digits is 7776000, while the sum is 51.

The spelling of 256265663415 in words is "two hundred fifty-six billion, two hundred sixty-five million, six hundred sixty-three thousand, four hundred fifteen".