25681431934 has 8 divisors (see below), whose sum is σ = 38524160808. Its totient is φ = 12840045000.

The previous prime is 25681431889. The next prime is 25681432019. The reversal of 25681431934 is 43913418652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286192 + ... + 365059.

It is an arithmetic number, because the mean of its divisors is an integer number (4815520101).

Almost surely, 2^25681431934 is an apocalyptic number.

25681431934 is a deficient number, since it is larger than the sum of its proper divisors (12842728874).

25681431934 is a wasteful number, since it uses less digits than its factorization.

25681431934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670970.

The product of its digits is 622080, while the sum is 46.

The spelling of 25681431934 in words is "twenty-five billion, six hundred eighty-one million, four hundred thirty-one thousand, nine hundred thirty-four".