25189273081 has 12 divisors (see below), whose sum is σ = 28824646656. Its totient is φ = 21563153640.

The previous prime is 25189273061. The next prime is 25189273103. The reversal of 25189273081 is 18037298152.

It is a happy number.

It is not a de Polignac number, because 25189273081 - 2⁵ = 25189273049 is a prime.

It is a super-2 number, since 2×25189273081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25189273061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15146056 + ... + 15147718.

It is an arithmetic number, because the mean of its divisors is an integer number (2402053888).

Almost surely, 2^25189273081 is an apocalyptic number.

It is an amenable number.

25189273081 is a deficient number, since it is larger than the sum of its proper divisors (3635373575).

25189273081 is an frugal number, since it uses more digits than its factorization.

25189273081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612 (or 3141 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 25189273081 in words is "twenty-five billion, one hundred eighty-nine million, two hundred seventy-three thousand, eighty-one".