89891789864 has 32 divisors (see below), whose sum is σ = 168945777000. Its totient is φ = 44839683072.

The previous prime is 89891789833. The next prime is 89891789891. The reversal of 89891789864 is 46898719898.

It can be written as a sum of positive squares in 4 ways, for example, as 78423521764 + 11468268100 = 280042^2 + 107090^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8976092 + ... + 8986100.

Almost surely, 2^89891789864 is an apocalyptic number.

It is an amenable number.

89891789864 is a deficient number, since it is larger than the sum of its proper divisors (79053987136).

89891789864 is a wasteful number, since it uses less digits than its factorization.

89891789864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12557 (or 12553 counting only the distinct ones).

The product of its digits is 501645312, while the sum is 77.

The spelling of 89891789864 in words is "eighty-nine billion, eight hundred ninety-one million, seven hundred eighty-nine thousand, eight hundred sixty-four".