86645800917 has 24 divisors (see below), whose sum is σ = 136116854328. Its totient is φ = 52792560000.

The previous prime is 86645800883. The next prime is 86645800921. The reversal of 86645800917 is 71900854668.

It can be written as a sum of positive squares in 4 ways, for example, as 37311171921 + 49334628996 = 193161^2 + 222114^2 .

It is not a de Polignac number, because 86645800917 - 2¹⁶ = 86645735381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86645800117) 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, 3654334 + ... + 3677967.

It is an arithmetic number, because the mean of its divisors is an integer number (5671535597).

Almost surely, 2^86645800917 is an apocalyptic number.

It is an amenable number.

86645800917 is a deficient number, since it is larger than the sum of its proper divisors (49471053411).

86645800917 is a wasteful number, since it uses less digits than its factorization.

86645800917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332421 (or 7332418 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 86645800917 in words is "eighty-six billion, six hundred forty-five million, eight hundred thousand, nine hundred seventeen".