25257132239897 has 4 divisors (see below), whose sum is σ = 26071878441216. Its totient is φ = 24442386038580.

The previous prime is 25257132239881. The next prime is 25257132239917. The reversal of 25257132239897 is 79893223175252.

It is a happy number.

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 not a de Polignac number, because 25257132239897 - 2⁴ = 25257132239881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25257132239837) 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, 407373100613 + ... + 407373100674.

It is an arithmetic number, because the mean of its divisors is an integer number (6517969610304).

Almost surely, 2^{25257132239897} is an apocalyptic number.

It is an amenable number.

25257132239897 is a deficient number, since it is larger than the sum of its proper divisors (814746201319).

25257132239897 is an equidigital number, since it uses as much as digits as its factorization.

25257132239897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814746201318.

The product of its digits is 114307200, while the sum is 65.

The spelling of 25257132239897 in words is "twenty-five trillion, two hundred fifty-seven billion, one hundred thirty-two million, two hundred thirty-nine thousand, eight hundred ninety-seven".