84591497965 has 16 divisors (see below), whose sum is σ = 109397978928. Its totient is φ = 62422004736.

The previous prime is 84591497959. The next prime is 84591497983. The reversal of 84591497965 is 56979419548.

It can be written as a sum of positive squares in 8 ways, for example, as 7590242884 + 77001255081 = 87122^2 + 277491^2 .

It is not a de Polignac number, because 84591497965 - 2⁵ = 84591497933 is a prime.

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 84591497965.

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, 384684 + ... + 563173.

It is an arithmetic number, because the mean of its divisors is an integer number (6837373683).

Almost surely, 2^84591497965 is an apocalyptic number.

It is an amenable number.

84591497965 is a deficient number, since it is larger than the sum of its proper divisors (24806480963).

84591497965 is a wasteful number, since it uses less digits than its factorization.

84591497965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949248.

The product of its digits is 97977600, while the sum is 67.

The spelling of 84591497965 in words is "eighty-four billion, five hundred ninety-one million, four hundred ninety-seven thousand, nine hundred sixty-five".