25729457916 has 12 divisors (see below), whose sum is σ = 60035401832. Its totient is φ = 8576485968.

The previous prime is 25729457893. The next prime is 25729457953. The reversal of 25729457916 is 61975492752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1072060735 + ... + 1072060758.

Almost surely, 2^25729457916 is an apocalyptic number.

It is an amenable number.

25729457916 is an abundant number, since it is smaller than the sum of its proper divisors (34305943916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25729457916 is a wasteful number, since it uses less digits than its factorization.

25729457916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144121500 (or 2144121498 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 57.

The spelling of 25729457916 in words is "twenty-five billion, seven hundred twenty-nine million, four hundred fifty-seven thousand, nine hundred sixteen".