28891585522965 has 32 divisors (see below), whose sum is σ = 51501905657856. Its totient is φ = 13709998026560.

The previous prime is 28891585522931. The next prime is 28891585522981. The reversal of 28891585522965 is 56922558519882.

It is not a de Polignac number, because 28891585522965 - 2²⁵ = 28891551968533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1862763717 + ... + 1862779226.

It is an arithmetic number, because the mean of its divisors is an integer number (1609434551808).

Almost surely, 2^{28891585522965} is an apocalyptic number.

It is an amenable number.

28891585522965 is a deficient number, since it is larger than the sum of its proper divisors (22610320134891).

28891585522965 is a wasteful number, since it uses less digits than its factorization.

28891585522965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725543009.

The product of its digits is 1244160000, while the sum is 75.

The spelling of 28891585522965 in words is "twenty-eight trillion, eight hundred ninety-one billion, five hundred eighty-five million, five hundred twenty-two thousand, nine hundred sixty-five".