63998000015 has 16 divisors (see below), whose sum is σ = 77289600000. Its totient is φ = 50871048192.

The previous prime is 63997999999. The next prime is 63998000039. The reversal of 63998000015 is 51000089936.

It is a cyclic number.

It is not a de Polignac number, because 63998000015 - 2⁴ = 63997999999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759986 + ... + 839984.

It is an arithmetic number, because the mean of its divisors is an integer number (4830600000).

Almost surely, 2^63998000015 is an apocalyptic number.

63998000015 is a deficient number, since it is larger than the sum of its proper divisors (13291599985).

63998000015 is a wasteful number, since it uses less digits than its factorization.

63998000015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81026.

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 63998000015 in words is "sixty-three billion, nine hundred ninety-eight million, fifteen", and thus it is an aban number.