86518968631 has 4 divisors (see below), whose sum is σ = 87099633000. Its totient is φ = 85938304264.

The previous prime is 86518968577. The next prime is 86518968643. The reversal of 86518968631 is 13686981568.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86518968631 - 2¹⁹ = 86518444343 is a prime.

It is a super-2 number, since 2×86518968631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86518968631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86518968671) 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 3 ways as a sum of consecutive naturals, for example, 290331961 + ... + 290332258.

It is an arithmetic number, because the mean of its divisors is an integer number (21774908250).

Almost surely, 2^86518968631 is an apocalyptic number.

86518968631 is a deficient number, since it is larger than the sum of its proper divisors (580664369).

86518968631 is a wasteful number, since it uses less digits than its factorization.

86518968631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580664368.

The product of its digits is 14929920, while the sum is 61.

The spelling of 86518968631 in words is "eighty-six billion, five hundred eighteen million, nine hundred sixty-eight thousand, six hundred thirty-one".