28206116664 has 64 divisors (see below), whose sum is σ = 80974512000. Its totient is φ = 8097448320.

The previous prime is 28206116657. The next prime is 28206116707. The reversal of 28206116664 is 46661160282.

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, 2806599 + ... + 2816630.

It is an arithmetic number, because the mean of its divisors is an integer number (1265226750).

Almost surely, 2^28206116664 is an apocalyptic number.

28206116664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28206116664 is an abundant number, since it is smaller than the sum of its proper divisors (52768395336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28206116664 is a wasteful number, since it uses less digits than its factorization.

28206116664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5623268 (or 5623264 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 28206116664 in words is "twenty-eight billion, two hundred six million, one hundred sixteen thousand, six hundred sixty-four".