63856499632 has 10 divisors (see below), whose sum is σ = 123721968068. Its totient is φ = 31928249808.

The previous prime is 63856499621. The next prime is 63856499639. The reversal of 63856499632 is 23699465836.

It is a happy number.

It is a super-2 number, since 2×63856499632² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63856499639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995515598 + ... + 1995515629.

Almost surely, 2^63856499632 is an apocalyptic number.

It is an amenable number.

63856499632 is a deficient number, since it is larger than the sum of its proper divisors (59865468436).

63856499632 is a wasteful number, since it uses less digits than its factorization.

63856499632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991031235 (or 3991031229 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 61.

The spelling of 63856499632 in words is "sixty-three billion, eight hundred fifty-six million, four hundred ninety-nine thousand, six hundred thirty-two".