67639913964 has 72 divisors (see below), whose sum is σ = 195496523040. Its totient is φ = 19316558592.

The previous prime is 67639913953. The next prime is 67639913969. The reversal of 67639913964 is 46931993676.

It is a super-2 number, since 2×67639913964² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (67639913969) 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, 480222 + ... + 604890.

Almost surely, 2^67639913964 is an apocalyptic number.

It is an amenable number.

67639913964 is an abundant number, since it is smaller than the sum of its proper divisors (127856609076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67639913964 is a wasteful number, since it uses less digits than its factorization.

67639913964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126839 (or 126834 counting only the distinct ones).

The product of its digits is 39680928, while the sum is 63.

The spelling of 67639913964 in words is "sixty-seven billion, six hundred thirty-nine million, nine hundred thirteen thousand, nine hundred sixty-four".