28556654884513 has 48 divisors (see below), whose sum is σ = 37126266577920. Its totient is φ = 21415799224512.

The previous prime is 28556654884481. The next prime is 28556654884531. The reversal of 28556654884513 is 31548845665582.

It is not a de Polignac number, because 28556654884513 - 2⁵ = 28556654884481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28556654884543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2977495 + ... + 8122732.

It is an arithmetic number, because the mean of its divisors is an integer number (773463887040).

Almost surely, 2^{28556654884513} is an apocalyptic number.

28556654884513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28556654884513 is a deficient number, since it is larger than the sum of its proper divisors (8569611693407).

28556654884513 is a wasteful number, since it uses less digits than its factorization.

28556654884513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100334 (or 11100305 counting only the distinct ones).

The product of its digits is 1105920000, while the sum is 70.

The spelling of 28556654884513 in words is "twenty-eight trillion, five hundred fifty-six billion, six hundred fifty-four million, eight hundred eighty-four thousand, five hundred thirteen".