2565167571220 has 24 divisors (see below), whose sum is σ = 5572605414600. Its totient is φ = 990685406592.

The previous prime is 2565167571193. The next prime is 2565167571259. The reversal of 2565167571220 is 221757615652.

It can be written as a sum of positive squares in 4 ways, for example, as 350916433924 + 2214251137296 = 592382^2 + 1488036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211350775 + ... + 2211351934.

It is an arithmetic number, because the mean of its divisors is an integer number (232191892275).

Almost surely, 2^{2565167571220} is an apocalyptic number.

2565167571220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565167571220 is an abundant number, since it is smaller than the sum of its proper divisors (3007437843380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565167571220 is a wasteful number, since it uses less digits than its factorization.

2565167571220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422702747 (or 4422702745 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 2565167571220 in words is "two trillion, five hundred sixty-five billion, one hundred sixty-seven million, five hundred seventy-one thousand, two hundred twenty".