25900927889 has 4 divisors (see below), whose sum is σ = 27264134640. Its totient is φ = 24537721140.

The previous prime is 25900927879. The next prime is 25900927901. The reversal of 25900927889 is 98872900952.

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 25900927889 - 2⁴ = 25900927873 is a prime.

It is a super-2 number, since 2×25900927889² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25900927879) 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, 681603347 + ... + 681603384.

It is an arithmetic number, because the mean of its divisors is an integer number (6816033660).

Almost surely, 2^25900927889 is an apocalyptic number.

It is an amenable number.

25900927889 is a deficient number, since it is larger than the sum of its proper divisors (1363206751).

25900927889 is a wasteful number, since it uses less digits than its factorization.

25900927889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363206750.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 25900927889 in words is "twenty-five billion, nine hundred million, nine hundred twenty-seven thousand, eight hundred eighty-nine".