63665063864 has 16 divisors (see below), whose sum is σ = 119494191600. Its totient is φ = 31799946112.

The previous prime is 63665063843. The next prime is 63665063873. The reversal of 63665063864 is 46836056636.

It is a super-2 number, since 2×63665063864² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 4064924 + ... + 4080555.

It is an arithmetic number, because the mean of its divisors is an integer number (7468386975).

Almost surely, 2^63665063864 is an apocalyptic number.

It is an amenable number.

63665063864 is a deficient number, since it is larger than the sum of its proper divisors (55829127736).

63665063864 is a wasteful number, since it uses less digits than its factorization.

63665063864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146462 (or 8146458 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 53.

The spelling of 63665063864 in words is "sixty-three billion, six hundred sixty-five million, sixty-three thousand, eight hundred sixty-four".