28055850165 has 24 divisors (see below), whose sum is σ = 55577303808. Its totient is φ = 12825531360.

The previous prime is 28055850131. The next prime is 28055850181. The reversal of 28055850165 is 56105855082.

28055850165 is a `hidden beast` number, since 2 + 8 + 0 + 5 + 585 + 0 + 1 + 65 = 666.

It is not a de Polignac number, because 28055850165 - 2⁷ = 28055850037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28055850165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44532781 + ... + 44533410.

It is an arithmetic number, because the mean of its divisors is an integer number (2315720992).

Almost surely, 2^28055850165 is an apocalyptic number.

It is an amenable number.

28055850165 is a deficient number, since it is larger than the sum of its proper divisors (27521453643).

28055850165 is a wasteful number, since it uses less digits than its factorization.

28055850165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89066209 (or 89066206 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 45.

The spelling of 28055850165 in words is "twenty-eight billion, fifty-five million, eight hundred fifty thousand, one hundred sixty-five".