86831604505 has 8 divisors (see below), whose sum is σ = 104235956424. Its totient is φ = 69439929600.

The previous prime is 86831604487. The next prime is 86831604521. The reversal of 86831604505 is 50540613868.

It can be written as a sum of positive squares in 4 ways, for example, as 2099380761 + 84732223744 = 45819^2 + 291088^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86831604505 - 2²¹ = 86829507353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3154176 + ... + 3181585.

It is an arithmetic number, because the mean of its divisors is an integer number (13029494553).

Almost surely, 2^86831604505 is an apocalyptic number.

It is an amenable number.

86831604505 is a deficient number, since it is larger than the sum of its proper divisors (17404351919).

86831604505 is a wasteful number, since it uses less digits than its factorization.

86831604505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6338507.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 86831604505 in words is "eighty-six billion, eight hundred thirty-one million, six hundred four thousand, five hundred five".