25189132681 has 4 divisors (see below), whose sum is σ = 25200044100. Its totient is φ = 25178221264.

The previous prime is 25189132651. The next prime is 25189132693. The reversal of 25189132681 is 18623198152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13451360400 + 11737772281 = 115980^2 + 108341^2 .

It is a cyclic number.

It is not a de Polignac number, because 25189132681 - 2¹³ = 25189124489 is a prime.

It is a super-2 number, since 2×25189132681² (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 (25189132651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5452246 + ... + 5456863.

It is an arithmetic number, because the mean of its divisors is an integer number (6300011025).

Almost surely, 2^25189132681 is an apocalyptic number.

It is an amenable number.

25189132681 is a deficient number, since it is larger than the sum of its proper divisors (10911419).

25189132681 is a wasteful number, since it uses less digits than its factorization.

25189132681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10911418.

The product of its digits is 207360, while the sum is 46.

The spelling of 25189132681 in words is "twenty-five billion, one hundred eighty-nine million, one hundred thirty-two thousand, six hundred eighty-one".