68463972639 has 24 divisors (see below), whose sum is σ = 104111047040. Its totient is φ = 43234680528.

The previous prime is 68463972617. The next prime is 68463972659. The reversal of 68463972639 is 93627936486.

68463972639 is a `hidden beast` number, since 68 + 463 + 97 + 26 + 3 + 9 = 666.

It is not a de Polignac number, because 68463972639 - 2⁵ = 68463972607 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68463972659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1538784 + ... + 1582650.

Almost surely, 2^68463972639 is an apocalyptic number.

68463972639 is a deficient number, since it is larger than the sum of its proper divisors (35647074401).

68463972639 is a wasteful number, since it uses less digits than its factorization.

68463972639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53019 (or 53016 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 68463972639 in words is "sixty-eight billion, four hundred sixty-three million, nine hundred seventy-two thousand, six hundred thirty-nine".