86879920515 has 32 divisors (see below), whose sum is σ = 140237830656. Its totient is φ = 45927552000.

The previous prime is 86879920513. The next prime is 86879920529. The reversal of 86879920515 is 51502997868.

It is a Cunningham number, because it is equal to 294754²-1.

It is not a de Polignac number, because 86879920515 - 2¹ = 86879920513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86879920513) 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, 835140 + ... + 933390.

It is an arithmetic number, because the mean of its divisors is an integer number (4382432208).

Almost surely, 2^86879920515 is an apocalyptic number.

86879920515 is a deficient number, since it is larger than the sum of its proper divisors (53357910141).

86879920515 is a wasteful number, since it uses less digits than its factorization.

86879920515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98779.

The product of its (nonzero) digits is 10886400, while the sum is 60.

The spelling of 86879920515 in words is "eighty-six billion, eight hundred seventy-nine million, nine hundred twenty thousand, five hundred fifteen".