28563584881578 has 16 divisors (see below), whose sum is σ = 57127280349216. Its totient is φ = 9521176529520.

The previous prime is 28563584881523. The next prime is 28563584881591. The reversal of 28563584881578 is 87518848536582.

It is a super-2 number, since 2×28563584881578² (a number of 28 digits) contains 22 as substring.

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, 1037101 + ... + 7629072.

It is an arithmetic number, because the mean of its divisors is an integer number (3570455021826).

Almost surely, 2^{28563584881578} is an apocalyptic number.

28563584881578 is an abundant number, since it is smaller than the sum of its proper divisors (28563695467638).

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

28563584881578 is a wasteful number, since it uses less digits than its factorization.

28563584881578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9215509.

The product of its digits is 4128768000, while the sum is 78.

The spelling of 28563584881578 in words is "twenty-eight trillion, five hundred sixty-three billion, five hundred eighty-four million, eight hundred eighty-one thousand, five hundred seventy-eight".