84536625664 has 40 divisors (see below), whose sum is σ = 171222026580. Its totient is φ = 41689276416.

The previous prime is 84536625661. The next prime is 84536625671. The reversal of 84536625664 is 46652663548.

It can be written as a sum of positive squares in 2 ways, for example, as 78965496064 + 5571129600 = 281008^2 + 74640^2 .

It is not an unprimeable number, because it can be changed into a prime (84536625661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093519 + ... + 1168270.

Almost surely, 2^84536625664 is an apocalyptic number.

It is an amenable number.

84536625664 is an abundant number, since it is smaller than the sum of its proper divisors (86685400916).

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

84536625664 is an equidigital number, since it uses as much as digits as its factorization.

84536625664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261880 (or 2261864 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 55.

The spelling of 84536625664 in words is "eighty-four billion, five hundred thirty-six million, six hundred twenty-five thousand, six hundred sixty-four".