28174784872564 has 24 divisors (see below), whose sum is σ = 53788391955648. Its totient is φ = 12806680803840.

The previous prime is 28174784872537. The next prime is 28174784872571. The reversal of 28174784872564 is 46527848747182.

It is a super-2 number, since 2×28174784872564² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 17132049 + ... + 18704455.

It is an arithmetic number, because the mean of its divisors is an integer number (2241182998152).

Almost surely, 2^{28174784872564} is an apocalyptic number.

It is an amenable number.

28174784872564 is a deficient number, since it is larger than the sum of its proper divisors (25613607083084).

28174784872564 is a wasteful number, since it uses less digits than its factorization.

28174784872564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979655 (or 1979653 counting only the distinct ones).

The product of its digits is 1348730880, while the sum is 73.

The spelling of 28174784872564 in words is "twenty-eight trillion, one hundred seventy-four billion, seven hundred eighty-four million, eight hundred seventy-two thousand, five hundred sixty-four".