85587684691 has 4 divisors (see below), whose sum is σ = 85588510392. Its totient is φ = 85586858992.

The previous prime is 85587684683. The next prime is 85587684697. The reversal of 85587684691 is 19648678558.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19648678558 = 2 ⋅9824339279.

It is a cyclic number.

It is not a de Polignac number, because 85587684691 - 2³ = 85587684683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85587684697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230530 + ... + 473623.

It is an arithmetic number, because the mean of its divisors is an integer number (21397127598).

Almost surely, 2^85587684691 is an apocalyptic number.

85587684691 is a deficient number, since it is larger than the sum of its proper divisors (825701).

85587684691 is a wasteful number, since it uses less digits than its factorization.

85587684691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825700.

The product of its digits is 116121600, while the sum is 67.

The spelling of 85587684691 in words is "eighty-five billion, five hundred eighty-seven million, six hundred eighty-four thousand, six hundred ninety-one".