63877689939 has 64 divisors (see below), whose sum is σ = 105111142400. Its totient is φ = 33689924352.

The previous prime is 63877689929. The next prime is 63877689947. The reversal of 63877689939 is 93998677836.

It is not a de Polignac number, because 63877689939 - 2⁴ = 63877689923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63877689929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7012662 + ... + 7021764.

It is an arithmetic number, because the mean of its divisors is an integer number (1642361600).

Almost surely, 2^63877689939 is an apocalyptic number.

63877689939 is a deficient number, since it is larger than the sum of its proper divisors (41233452461).

63877689939 is a wasteful number, since it uses less digits than its factorization.

63877689939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9584.

The product of its digits is 740710656, while the sum is 75.

The spelling of 63877689939 in words is "sixty-three billion, eight hundred seventy-seven million, six hundred eighty-nine thousand, nine hundred thirty-nine".