85647872631 has 8 divisors (see below), whose sum is σ = 117880943104. Its totient is φ = 55256691960.

The previous prime is 85647872539. The next prime is 85647872657. The reversal of 85647872631 is 13627874658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85647872631 - 2²⁵ = 85614318199 is a prime.

It is a super-2 number, since 2×85647872631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85647872731) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 460472341 + ... + 460472526.

It is an arithmetic number, because the mean of its divisors is an integer number (14735117888).

Almost surely, 2^85647872631 is an apocalyptic number.

85647872631 is a deficient number, since it is larger than the sum of its proper divisors (32233070473).

85647872631 is a wasteful number, since it uses less digits than its factorization.

85647872631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920944901.

The product of its digits is 13547520, while the sum is 57.

The spelling of 85647872631 in words is "eighty-five billion, six hundred forty-seven million, eight hundred seventy-two thousand, six hundred thirty-one".