25727746564 has 24 divisors (see below), whose sum is σ = 48966985368. Its totient is φ = 11756774400.

The previous prime is 25727746553. The next prime is 25727746567. The reversal of 25727746564 is 46564772752.

It can be written as a sum of positive squares in 4 ways, for example, as 7857404164 + 17870342400 = 88642^2 + 133680^2 .

It is a super-2 number, since 2×25727746564² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25727746567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2444077 + ... + 2454580.

It is an arithmetic number, because the mean of its divisors is an integer number (2040291057).

Almost surely, 2^25727746564 is an apocalyptic number.

It is an amenable number.

25727746564 is a deficient number, since it is larger than the sum of its proper divisors (23239238804).

25727746564 is a wasteful number, since it uses less digits than its factorization.

25727746564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898775 (or 4898773 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 55.

The spelling of 25727746564 in words is "twenty-five billion, seven hundred twenty-seven million, seven hundred forty-six thousand, five hundred sixty-four".