28117169064 has 80 divisors (see below), whose sum is σ = 79374451200. Its totient is φ = 9298564128.

The previous prime is 28117169029. The next prime is 28117169071. The reversal of 28117169064 is 46096171182.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 88534 + ... + 253125.

It is an arithmetic number, because the mean of its divisors is an integer number (992180640).

Almost surely, 2^28117169064 is an apocalyptic number.

28117169064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28117169064 is an abundant number, since it is smaller than the sum of its proper divisors (51257282136).

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

28117169064 is a wasteful number, since it uses less digits than its factorization.

28117169064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341804 (or 341791 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 28117169064 in words is "twenty-eight billion, one hundred seventeen million, one hundred sixty-nine thousand, sixty-four".