83564979631 has 8 divisors (see below), whose sum is σ = 98083991840. Its totient is φ = 69691256928.

The previous prime is 83564979613. The next prime is 83564979643. The reversal of 83564979631 is 13697946538.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83564979631 - 2¹¹ = 83564977583 is a prime.

It is a super-2 number, since 2×83564979631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83564979631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83564979671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161322096 + ... + 161322613.

It is an arithmetic number, because the mean of its divisors is an integer number (12260498980).

Almost surely, 2^83564979631 is an apocalyptic number.

83564979631 is a deficient number, since it is larger than the sum of its proper divisors (14519012209).

83564979631 is a wasteful number, since it uses less digits than its factorization.

83564979631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322644753.

The product of its digits is 29393280, while the sum is 61.

The spelling of 83564979631 in words is "eighty-three billion, five hundred sixty-four million, nine hundred seventy-nine thousand, six hundred thirty-one".