86921503865 has 16 divisors (see below), whose sum is σ = 119239229952. Its totient is φ = 59587018944.

The previous prime is 86921503861. The next prime is 86921503891. The reversal of 86921503865 is 56830512968.

It is a cyclic number.

It is not a de Polignac number, because 86921503865 - 2² = 86921503861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86921503861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209009 + ... + 466398.

It is an arithmetic number, because the mean of its divisors is an integer number (7452451872).

Almost surely, 2^86921503865 is an apocalyptic number.

It is an amenable number.

86921503865 is a deficient number, since it is larger than the sum of its proper divisors (32317726087).

86921503865 is a wasteful number, since it uses less digits than its factorization.

86921503865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679096.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 86921503865 in words is "eighty-six billion, nine hundred twenty-one million, five hundred three thousand, eight hundred sixty-five".