2856656638 has 8 divisors (see below), whose sum is σ = 4674529080. Its totient is φ = 1298480280.

The previous prime is 2856656633. The next prime is 2856656639. The reversal of 2856656638 is 8366566582.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856656633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64923993 + ... + 64924036.

It is an arithmetic number, because the mean of its divisors is an integer number (584316135).

Almost surely, 2^2856656638 is an apocalyptic number.

2856656638 is a deficient number, since it is larger than the sum of its proper divisors (1817872442).

2856656638 is a wasteful number, since it uses less digits than its factorization.

2856656638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129848042.

The product of its digits is 12441600, while the sum is 55.

The square root of 2856656638 is about 53447.7000253519. The cubic root of 2856656638 is about 1418.9029147658.

The spelling of 2856656638 in words is "two billion, eight hundred fifty-six million, six hundred fifty-six thousand, six hundred thirty-eight".