25842179257 has 4 divisors (see below), whose sum is σ = 25855426816. Its totient is φ = 25828931700.

The previous prime is 25842179239. The next prime is 25842179269. The reversal of 25842179257 is 75297124852.

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 25842179257 - 2²³ = 25833790649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25842179227) 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, 6620853 + ... + 6624754.

It is an arithmetic number, because the mean of its divisors is an integer number (6463856704).

Almost surely, 2^25842179257 is an apocalyptic number.

It is an amenable number.

25842179257 is a deficient number, since it is larger than the sum of its proper divisors (13247559).

25842179257 is a wasteful number, since it uses less digits than its factorization.

25842179257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13247558.

The product of its digits is 2822400, while the sum is 52.

The spelling of 25842179257 in words is "twenty-five billion, eight hundred forty-two million, one hundred seventy-nine thousand, two hundred fifty-seven".