25941475957 has 4 divisors (see below), whose sum is σ = 27069366240. Its totient is φ = 24813585676.

The previous prime is 25941475921. The next prime is 25941475961. The reversal of 25941475957 is 75957414952.

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-25941475957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25941470957) 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, 563945107 + ... + 563945152.

It is an arithmetic number, because the mean of its divisors is an integer number (6767341560).

Almost surely, 2^25941475957 is an apocalyptic number.

It is an amenable number.

25941475957 is a deficient number, since it is larger than the sum of its proper divisors (1127890283).

25941475957 is a wasteful number, since it uses less digits than its factorization.

25941475957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127890282.

The product of its digits is 15876000, while the sum is 58.

The spelling of 25941475957 in words is "twenty-five billion, nine hundred forty-one million, four hundred seventy-five thousand, nine hundred fifty-seven".