86812516579 has 4 divisors (see below), whose sum is σ = 87089873176. Its totient is φ = 86535159984.

The previous prime is 86812516541. The next prime is 86812516607. The reversal of 86812516579 is 97561521868.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86812516579 - 2²¹ = 86810419427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86812516079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138677829 + ... + 138678454.

It is an arithmetic number, because the mean of its divisors is an integer number (21772468294).

Almost surely, 2^86812516579 is an apocalyptic number.

86812516579 is a deficient number, since it is larger than the sum of its proper divisors (277356597).

86812516579 is a wasteful number, since it uses less digits than its factorization.

86812516579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277356596.

The product of its digits is 7257600, while the sum is 58.

The spelling of 86812516579 in words is "eighty-six billion, eight hundred twelve million, five hundred sixteen thousand, five hundred seventy-nine".