25925898849 has 8 divisors (see below), whose sum is σ = 34572742560. Its totient is φ = 17281493856.

The previous prime is 25925898821. The next prime is 25925898871. The reversal of 25925898849 is 94889852952.

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

It is not a de Polignac number, because 25925898849 - 2⁹ = 25925898337 is a prime.

It is a super-2 number, since 2×25925898849² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25925898809) 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, 584727 + ... + 627500.

It is an arithmetic number, because the mean of its divisors is an integer number (4321592820).

Almost surely, 2^25925898849 is an apocalyptic number.

It is an amenable number.

25925898849 is a deficient number, since it is larger than the sum of its proper divisors (8646843711).

25925898849 is a wasteful number, since it uses less digits than its factorization.

25925898849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219359.

The product of its digits is 149299200, while the sum is 69.

The spelling of 25925898849 in words is "twenty-five billion, nine hundred twenty-five million, eight hundred ninety-eight thousand, eight hundred forty-nine".