25765565660 has 24 divisors (see below), whose sum is σ = 54125843856. Its totient is φ = 10302768000.

The previous prime is 25765565659. The next prime is 25765565699. The reversal of 25765565660 is 6656556752.

It is a super-3 number, since 3×25765565660³ (a number of 32 digits) contains 333 as substring.

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, 154622 + ... + 274661.

It is an arithmetic number, because the mean of its divisors is an integer number (2255243494).

Almost surely, 2^25765565660 is an apocalyptic number.

25765565660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25765565660 is an abundant number, since it is smaller than the sum of its proper divisors (28360278196).

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

25765565660 is a wasteful number, since it uses less digits than its factorization.

25765565660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432293 (or 432291 counting only the distinct ones).

The product of its (nonzero) digits is 11340000, while the sum is 53.

The spelling of 25765565660 in words is "twenty-five billion, seven hundred sixty-five million, five hundred sixty-five thousand, six hundred sixty".