28054931385599 has 4 divisors (see below), whose sum is σ = 28312316077320. Its totient is φ = 27797546693880.

The previous prime is 28054931385589. The next prime is 28054931385659. The reversal of 28054931385599 is 99558313945082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28054931385599 - 2²⁰ = 28054930337023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28054931385589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128692345697 + ... + 128692345914.

It is an arithmetic number, because the mean of its divisors is an integer number (7078079019330).

Almost surely, 2^{28054931385599} is an apocalyptic number.

28054931385599 is a deficient number, since it is larger than the sum of its proper divisors (257384691721).

28054931385599 is a wasteful number, since it uses less digits than its factorization.

28054931385599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257384691720.

The product of its (nonzero) digits is 419904000, while the sum is 71.

The spelling of 28054931385599 in words is "twenty-eight trillion, fifty-four billion, nine hundred thirty-one million, three hundred eighty-five thousand, five hundred ninety-nine".