86520185409 has 16 divisors (see below), whose sum is σ = 131845633920. Its totient is φ = 49438099200.

The previous prime is 86520185363. The next prime is 86520185443. The reversal of 86520185409 is 90458102568.

It is not a de Polignac number, because 86520185409 - 2⁸ = 86520185153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86520185809) 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, 562009 + ... + 699209.

It is an arithmetic number, because the mean of its divisors is an integer number (8240352120).

Almost surely, 2^86520185409 is an apocalyptic number.

It is an amenable number.

86520185409 is a deficient number, since it is larger than the sum of its proper divisors (45325448511).

86520185409 is a wasteful number, since it uses less digits than its factorization.

86520185409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167240.

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 86520185409 in words is "eighty-six billion, five hundred twenty million, one hundred eighty-five thousand, four hundred nine".