25013432257 has 4 divisors (see below), whose sum is σ = 27287380656. Its totient is φ = 22739483860.

The previous prime is 25013432243. The next prime is 25013432267. The reversal of 25013432257 is 75223431052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25013432257 is a prime.

It is a super-2 number, since 2×25013432257² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25013432267) 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, 1136974183 + ... + 1136974204.

It is an arithmetic number, because the mean of its divisors is an integer number (6821845164).

Almost surely, 2^25013432257 is an apocalyptic number.

It is an amenable number.

25013432257 is a deficient number, since it is larger than the sum of its proper divisors (2273948399).

25013432257 is a wasteful number, since it uses less digits than its factorization.

25013432257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273948398.

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 25013432257 in words is "twenty-five billion, thirteen million, four hundred thirty-two thousand, two hundred fifty-seven".