63976397639 has 12 divisors (see below), whose sum is σ = 80367046032. Its totient is φ = 49851737760.

The previous prime is 63976397623. The next prime is 63976397659. The reversal of 63976397639 is 93679367936.

It is not a de Polignac number, because 63976397639 - 2⁴ = 63976397623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63976397659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37765622 + ... + 37767315.

It is an arithmetic number, because the mean of its divisors is an integer number (6697253836).

Almost surely, 2^63976397639 is an apocalyptic number.

63976397639 is a deficient number, since it is larger than the sum of its proper divisors (16390648393).

63976397639 is a wasteful number, since it uses less digits than its factorization.

63976397639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75532966 (or 75532955 counting only the distinct ones).

The product of its digits is 208324872, while the sum is 68.

The spelling of 63976397639 in words is "sixty-three billion, nine hundred seventy-six million, three hundred ninety-seven thousand, six hundred thirty-nine".