85538617631 has 8 divisors (see below), whose sum is σ = 86377297104. Its totient is φ = 84700665280.

The previous prime is 85538617583. The next prime is 85538617687. The reversal of 85538617631 is 13671683558.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85538617631 - 2²⁶ = 85471508767 is a prime.

It is a super-2 number, since 2×85538617631² (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 (85538619631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56171 + ... + 417411.

It is an arithmetic number, because the mean of its divisors is an integer number (10797162138).

Almost surely, 2^85538617631 is an apocalyptic number.

85538617631 is a deficient number, since it is larger than the sum of its proper divisors (838679473).

85538617631 is a wasteful number, since it uses less digits than its factorization.

85538617631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363561.

The product of its digits is 3628800, while the sum is 53.

The spelling of 85538617631 in words is "eighty-five billion, five hundred thirty-eight million, six hundred seventeen thousand, six hundred thirty-one".