63701689648 has 20 divisors (see below), whose sum is σ = 123426026568. Its totient is φ = 31849811840.

The previous prime is 63701689609. The next prime is 63701689691. The reversal of 63701689648 is 84698610736.

It is a happy number.

63701689648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63701689648² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63701689592 and 63701689601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775140 + ... + 853372.

Almost surely, 2^63701689648 is an apocalyptic number.

It is an amenable number.

63701689648 is a deficient number, since it is larger than the sum of its proper divisors (59724336920).

63701689648 is a wasteful number, since it uses less digits than its factorization.

63701689648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129132 (or 129126 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 63701689648 in words is "sixty-three billion, seven hundred one million, six hundred eighty-nine thousand, six hundred forty-eight".