25891229957 has 8 divisors (see below), whose sum is σ = 26791564800. Its totient is φ = 24991397424.

The previous prime is 25891229821. The next prime is 25891229963. The reversal of 25891229957 is 75992219852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25891229957 - 2⁸ = 25891229701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25891229896 and 25891229905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25891229257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19157 + ... + 228362.

It is an arithmetic number, because the mean of its divisors is an integer number (3348945600).

Almost surely, 2^25891229957 is an apocalyptic number.

It is an amenable number.

25891229957 is a deficient number, since it is larger than the sum of its proper divisors (900334843).

25891229957 is a wasteful number, since it uses less digits than its factorization.

25891229957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251155.

The product of its digits is 8164800, while the sum is 59.

The spelling of 25891229957 in words is "twenty-five billion, eight hundred ninety-one million, two hundred twenty-nine thousand, nine hundred fifty-seven".