63879656 has 8 divisors (see below), whose sum is σ = 119774370. Its totient is φ = 31939824.

The previous prime is 63879643. The next prime is 63879667. The reversal of 63879656 is 65697836.

It can be written as a sum of positive squares in only one way, i.e., 63457156 + 422500 = 7966^2 + 650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×63879656² = 8161220901356672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992471 + ... + 3992486.

Almost surely, 2^63879656 is an apocalyptic number.

It is an amenable number.

63879656 is a deficient number, since it is larger than the sum of its proper divisors (55894714).

63879656 is a wasteful number, since it uses less digits than its factorization.

63879656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7984963 (or 7984959 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 50.

The square root of 63879656 is about 7992.4749608616. The cubic root of 63879656 is about 399.7491260218.

The spelling of 63879656 in words is "sixty-three million, eight hundred seventy-nine thousand, six hundred fifty-six".