28578508554975 has 24 divisors (see below), whose sum is σ = 47259302694672. Its totient is φ = 15238806105600.

The previous prime is 28578508554961. The next prime is 28578508555013. The reversal of 28578508554975 is 57945580587582.

It is not a de Polignac number, because 28578508554975 - 2⁸ = 28578508554719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28578508554975.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37938586 + ... + 38684535.

It is an arithmetic number, because the mean of its divisors is an integer number (1969137612278).

Almost surely, 2^{28578508554975} is an apocalyptic number.

28578508554975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28578508554975 is a deficient number, since it is larger than the sum of its proper divisors (18680794139697).

28578508554975 is a wasteful number, since it uses less digits than its factorization.

28578508554975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76628107 (or 76628102 counting only the distinct ones).

The product of its (nonzero) digits is 5644800000, while the sum is 78.

The spelling of 28578508554975 in words is "twenty-eight trillion, five hundred seventy-eight billion, five hundred eight million, five hundred fifty-four thousand, nine hundred seventy-five".