86861122815 has 32 divisors (see below), whose sum is σ = 140577877440. Its totient is φ = 45794543616.

The previous prime is 86861122771. The next prime is 86861122837. The reversal of 86861122815 is 51822116868.

It is not a de Polignac number, because 86861122815 - 2¹⁷ = 86860991743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 646609 + ... + 769301.

It is an arithmetic number, because the mean of its divisors is an integer number (4393058670).

Almost surely, 2^86861122815 is an apocalyptic number.

86861122815 is a deficient number, since it is larger than the sum of its proper divisors (53716754625).

86861122815 is a wasteful number, since it uses less digits than its factorization.

86861122815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123243.

The product of its digits is 368640, while the sum is 48.

The spelling of 86861122815 in words is "eighty-six billion, eight hundred sixty-one million, one hundred twenty-two thousand, eight hundred fifteen".