83649923968 has 128 divisors (see below), whose sum is σ = 191839233600. Its totient is φ = 36027678720.

The previous prime is 83649923941. The next prime is 83649923977. The reversal of 83649923968 is 86932994638.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1542498 + ... + 1595806.

Almost surely, 2^83649923968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83649923968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95919616800).

83649923968 is an abundant number, since it is smaller than the sum of its proper divisors (108189309632).

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

83649923968 is a wasteful number, since it uses less digits than its factorization.

83649923968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53400 (or 53388 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 67.

The spelling of 83649923968 in words is "eighty-three billion, six hundred forty-nine million, nine hundred twenty-three thousand, nine hundred sixty-eight".