28577431565 has 16 divisors (see below), whose sum is σ = 34383611136. Its totient is φ = 22801564800.

The previous prime is 28577431523. The next prime is 28577431601. The reversal of 28577431565 is 56513477582.

It is not a de Polignac number, because 28577431565 - 2⁶ = 28577431501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3349505 + ... + 3358025.

It is an arithmetic number, because the mean of its divisors is an integer number (2148975696).

Almost surely, 2^28577431565 is an apocalyptic number.

It is an amenable number.

28577431565 is a deficient number, since it is larger than the sum of its proper divisors (5806179571).

28577431565 is a wasteful number, since it uses less digits than its factorization.

28577431565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220.

The product of its digits is 7056000, while the sum is 53.

The spelling of 28577431565 in words is "twenty-eight billion, five hundred seventy-seven million, four hundred thirty-one thousand, five hundred sixty-five".