25657690132 has 12 divisors (see below), whose sum is σ = 44903033140. Its totient is φ = 12828252096.

The previous prime is 25657690127. The next prime is 25657690139. The reversal of 25657690132 is 23109675652.

It can be written as a sum of positive squares in 2 ways, for example, as 8665003396 + 16992686736 = 93086^2 + 130356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25657690139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42507 + ... + 230482.

Almost surely, 2^25657690132 is an apocalyptic number.

It is an amenable number.

25657690132 is a deficient number, since it is larger than the sum of its proper divisors (19245343008).

25657690132 is a wasteful number, since it uses less digits than its factorization.

25657690132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296490 (or 296488 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 25657690132 in words is "twenty-five billion, six hundred fifty-seven million, six hundred ninety thousand, one hundred thirty-two".