25189434321 has 16 divisors (see below), whose sum is σ = 34021666560. Its totient is φ = 16575212160.

The previous prime is 25189434313. The next prime is 25189434329. The reversal of 25189434321 is 12343498152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25189434313) and next prime (25189434329).

It is not a de Polignac number, because 25189434321 - 2³ = 25189434313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25189434329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836751 + ... + 866331.

It is an arithmetic number, because the mean of its divisors is an integer number (2126354160).

Almost surely, 2^25189434321 is an apocalyptic number.

It is an amenable number.

25189434321 is a deficient number, since it is larger than the sum of its proper divisors (8832232239).

25189434321 is a wasteful number, since it uses less digits than its factorization.

25189434321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33256.

The product of its digits is 207360, while the sum is 42.

The spelling of 25189434321 in words is "twenty-five billion, one hundred eighty-nine million, four hundred thirty-four thousand, three hundred twenty-one".