25643133352 has 16 divisors (see below), whose sum is σ = 48088566900. Its totient is φ = 12819515520.

The previous prime is 25643133301. The next prime is 25643133407. The reversal of 25643133352 is 25333134652.

It can be written as a sum of positive squares in 2 ways, for example, as 25585282116 + 57851236 = 159954^2 + 7606^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202599 + ... + 303862.

Almost surely, 2^25643133352 is an apocalyptic number.

It is an amenable number.

25643133352 is a deficient number, since it is larger than the sum of its proper divisors (22445433548).

25643133352 is a wasteful number, since it uses less digits than its factorization.

25643133352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512796 (or 512792 counting only the distinct ones).

The product of its digits is 194400, while the sum is 37.

The spelling of 25643133352 in words is "twenty-five billion, six hundred forty-three million, one hundred thirty-three thousand, three hundred fifty-two".