2556906915 has 8 divisors (see below), whose sum is σ = 4091051088. Its totient is φ = 1363683680.

The previous prime is 2556906853. The next prime is 2556906959. The reversal of 2556906915 is 5196096552.

2556906915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2556906915 - 2⁷ = 2556906787 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85230216 + ... + 85230245.

It is an arithmetic number, because the mean of its divisors is an integer number (511381386).

Almost surely, 2^2556906915 is an apocalyptic number.

2556906915 is a deficient number, since it is larger than the sum of its proper divisors (1534144173).

2556906915 is a wasteful number, since it uses less digits than its factorization.

2556906915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170460469.

The product of its (nonzero) digits is 729000, while the sum is 48.

The square root of 2556906915 is about 50565.8670943157. The cubic root of 2556906915 is about 1367.4295872848.

The spelling of 2556906915 in words is "two billion, five hundred fifty-six million, nine hundred six thousand, nine hundred fifteen".