86719218021615 has 16 divisors (see below), whose sum is σ = 138830812782048. Its totient is φ = 46223561629056.

The previous prime is 86719218021511. The next prime is 86719218021757. The reversal of 86719218021615 is 51612081291768.

It is a happy number.

It is not a de Polignac number, because 86719218021615 - 2⁷ = 86719218021487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1667972044 + ... + 1668024033.

It is an arithmetic number, because the mean of its divisors is an integer number (8676925798878).

Almost surely, 2^{86719218021615} is an apocalyptic number.

86719218021615 is a deficient number, since it is larger than the sum of its proper divisors (52111594760433).

86719218021615 is a wasteful number, since it uses less digits than its factorization.

86719218021615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335997818.

The product of its (nonzero) digits is 2903040, while the sum is 57.

The spelling of 86719218021615 in words is "eighty-six trillion, seven hundred nineteen billion, two hundred eighteen million, twenty-one thousand, six hundred fifteen".