86691175218 has 24 divisors (see below), whose sum is σ = 187839302508. Its totient is φ = 28895762592.

The previous prime is 86691175171. The next prime is 86691175223. The reversal of 86691175218 is 81257119668.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76257165609 + 10434009609 = 276147^2 + 102147^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359196 + ... + 549912.

Almost surely, 2^86691175218 is an apocalyptic number.

86691175218 is an abundant number, since it is smaller than the sum of its proper divisors (101148127290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86691175218 is a wasteful number, since it uses less digits than its factorization.

86691175218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215978 (or 215975 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The spelling of 86691175218 in words is "eighty-six billion, six hundred ninety-one million, one hundred seventy-five thousand, two hundred eighteen".