84520685172 has 48 divisors (see below), whose sum is σ = 245878359552. Its totient is φ = 21953424480.

The previous prime is 84520685143. The next prime is 84520685201. The reversal of 84520685172 is 27158602548.

It is an interprime number because it is at equal distance from previous prime (84520685143) and next prime (84520685201).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 45735378 + ... + 45737225.

It is an arithmetic number, because the mean of its divisors is an integer number (5122465824).

Almost surely, 2^84520685172 is an apocalyptic number.

It is an amenable number.

84520685172 is an abundant number, since it is smaller than the sum of its proper divisors (161357674380).

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

84520685172 is a wasteful number, since it uses less digits than its factorization.

84520685172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91472628 (or 91472626 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 84520685172 in words is "eighty-four billion, five hundred twenty million, six hundred eighty-five thousand, one hundred seventy-two".