25974801889 has 3 divisors (see below), whose sum is σ = 25974963057. Its totient is φ = 25974640722.

The previous prime is 25974801871. The next prime is 25974801913. The reversal of 25974801889 is 98810847952.

The square root of 25974801889 is 161167.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25974801889 - 2¹⁹ = 25974277601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25974801829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 80584 + ... + 241750.

It is an arithmetic number, because the mean of its divisors is an integer number (8658321019).

Almost surely, 2^25974801889 is an apocalyptic number.

25974801889 is the 161167-th square number.

25974801889 is the 80584-th centered octagonal number.

It is an amenable number.

25974801889 is a deficient number, since it is larger than the sum of its proper divisors (161168).

25974801889 is an frugal number, since it uses more digits than its factorization.

25974801889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322334 (or 161167 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 25974801889 in words is "twenty-five billion, nine hundred seventy-four million, eight hundred one thousand, eight hundred eighty-nine".