83651915997 has 32 divisors (see below), whose sum is σ = 141312447360. Its totient is φ = 48449975040.

The previous prime is 83651915981. The next prime is 83651916011. The reversal of 83651915997 is 79951915638.

83651915997 is a `hidden beast` number, since 8 + 36 + 5 + 1 + 9 + 1 + 599 + 7 = 666.

It is not a de Polignac number, because 83651915997 - 2⁴ = 83651915981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83651915957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7003579 + ... + 7015512.

It is an arithmetic number, because the mean of its divisors is an integer number (4416013980).

Almost surely, 2^83651915997 is an apocalyptic number.

It is an amenable number.

83651915997 is a deficient number, since it is larger than the sum of its proper divisors (57660531363).

83651915997 is a wasteful number, since it uses less digits than its factorization.

83651915997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14019130 (or 14019124 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 63.

The spelling of 83651915997 in words is "eighty-three billion, six hundred fifty-one million, nine hundred fifteen thousand, nine hundred ninety-seven".