83697679638 has 48 divisors (see below), whose sum is σ = 185896400976. Its totient is φ = 27201343680.

The previous prime is 83697679631. The next prime is 83697679643.

83697679638 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×83697679638² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83697679631) 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, 334048 + ... + 528188.

It is an arithmetic number, because the mean of its divisors is an integer number (3872841687).

Almost surely, 2^83697679638 is an apocalyptic number.

83697679638 is an abundant number, since it is smaller than the sum of its proper divisors (102198721338).

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

83697679638 is a wasteful number, since it uses less digits than its factorization.

83697679638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194749 (or 194746 counting only the distinct ones).

The product of its digits is 493807104, while the sum is 72.

The spelling of 83697679638 in words is "eighty-three billion, six hundred ninety-seven million, six hundred seventy-nine thousand, six hundred thirty-eight".