84981520431 has 24 divisors (see below), whose sum is σ = 123412698864. Its totient is φ = 56349336960.

The previous prime is 84981520357. The next prime is 84981520483. The reversal of 84981520431 is 13402518948.

84981520431 is a `hidden beast` number, since 8 + 4 + 9 + 81 + 520 + 43 + 1 = 666.

It is not a de Polignac number, because 84981520431 - 2⁹ = 84981519919 is a prime.

It is a super-2 number, since 2×84981520431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84981520231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3094995 + ... + 3122331.

It is an arithmetic number, because the mean of its divisors is an integer number (5142195786).

Almost surely, 2^84981520431 is an apocalyptic number.

84981520431 is a deficient number, since it is larger than the sum of its proper divisors (38431178433).

84981520431 is a wasteful number, since it uses less digits than its factorization.

84981520431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29191 (or 29188 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 84981520431 in words is "eighty-four billion, nine hundred eighty-one million, five hundred twenty thousand, four hundred thirty-one".