84731558420 has 18 divisors (see below), whose sum is σ = 177939006462. Its totient is φ = 33892102656.

The previous prime is 84731558419. The next prime is 84731558441. The reversal of 84731558420 is 2485513748.

It can be written as a sum of positive squares in 3 ways, for example, as 63344835856 + 21386722564 = 251684^2 + 146242^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1269236 + ... + 1334324.

It is an arithmetic number, because the mean of its divisors is an integer number (9885500359).

Almost surely, 2^84731558420 is an apocalyptic number.

It is an amenable number.

84731558420 is an abundant number, since it is smaller than the sum of its proper divisors (93207448042).

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

84731558420 is an frugal number, since it uses more digits than its factorization.

84731558420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130187 (or 65096 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 84731558420 in words is "eighty-four billion, seven hundred thirty-one million, five hundred fifty-eight thousand, four hundred twenty".