25640335876 has 45 divisors (see below), whose sum is σ = 47715033751. Its totient is φ = 12054925784.

The previous prime is 25640335873. The next prime is 25640335909. The reversal of 25640335876 is 67853304652.

The square root of 25640335876 is 160126.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25640335873) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 434581935 + ... + 434581993.

Almost surely, 2^25640335876 is an apocalyptic number.

25640335876 is the 160126-th square number.

It is an amenable number.

25640335876 is a deficient number, since it is larger than the sum of its proper divisors (22074697875).

25640335876 is an frugal number, since it uses more digits than its factorization.

25640335876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

Multiplying 25640335876 by its sum of digits (49), we get a square (1256376457924 = 1120882²).

The spelling of 25640335876 in words is "twenty-five billion, six hundred forty million, three hundred thirty-five thousand, eight hundred seventy-six".