86518552255491 has 16 divisors (see below), whose sum is σ = 115573673124000. Its totient is φ = 57571248342528.

The previous prime is 86518552255441. The next prime is 86518552255561. The reversal of 86518552255491 is 19455225581568.

It is not a de Polignac number, because 86518552255491 - 2⁶ = 86518552255427 is a prime.

It is a super-2 number, since 2×86518552255491² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86518552255441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20910765 + ... + 24704193.

It is an arithmetic number, because the mean of its divisors is an integer number (7223354570250).

Almost surely, 2^{86518552255491} is an apocalyptic number.

86518552255491 is a deficient number, since it is larger than the sum of its proper divisors (29055120868509).

86518552255491 is a wasteful number, since it uses less digits than its factorization.

86518552255491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807638.

The product of its digits is 172800000, while the sum is 66.

The spelling of 86518552255491 in words is "eighty-six trillion, five hundred eighteen billion, five hundred fifty-two million, two hundred fifty-five thousand, four hundred ninety-one".