86199391431 has 32 divisors (see below), whose sum is σ = 128103467520. Its totient is φ = 57286196352.

The previous prime is 86199391409. The next prime is 86199391433. The reversal of 86199391431 is 13419399168.

86199391431 is a `hidden beast` number, since 8 + 619 + 9 + 3 + 9 + 14 + 3 + 1 = 666.

It is not a de Polignac number, because 86199391431 - 2⁶ = 86199391367 is a prime.

It is a super-2 number, since 2×86199391431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86199391433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19486686 + ... + 19491108.

It is an arithmetic number, because the mean of its divisors is an integer number (4003233360).

Almost surely, 2^86199391431 is an apocalyptic number.

86199391431 is a deficient number, since it is larger than the sum of its proper divisors (41904076089).

86199391431 is a wasteful number, since it uses less digits than its factorization.

86199391431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532 (or 6526 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The spelling of 86199391431 in words is "eighty-six billion, one hundred ninety-nine million, three hundred ninety-one thousand, four hundred thirty-one".