86615615 has 4 divisors (see below), whose sum is σ = 103938744. Its totient is φ = 69292488.

The previous prime is 86615603. The next prime is 86615671. The reversal of 86615615 is 51651668.

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 86615615 - 2²⁰ = 85567039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8661557 + ... + 8661566.

It is an arithmetic number, because the mean of its divisors is an integer number (25984686).

Almost surely, 2^86615615 is an apocalyptic number.

86615615 is a deficient number, since it is larger than the sum of its proper divisors (17323129).

86615615 is a wasteful number, since it uses less digits than its factorization.

86615615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17323128.

The product of its digits is 43200, while the sum is 38.

The square root of 86615615 is about 9306.7510442689. The cubic root of 86615615 is about 442.4512208564.

The spelling of 86615615 in words is "eighty-six million, six hundred fifteen thousand, six hundred fifteen".