25009431779712 has 32 divisors (see below), whose sum is σ = 66431303165880. Its totient is φ = 8336477259776.

The previous prime is 25009431779653. The next prime is 25009431779713. The reversal of 25009431779712 is 21797713490052.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25009431779713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32564363913 + ... + 32564364680.

Almost surely, 2^{25009431779712} is an apocalyptic number.

It is an amenable number.

25009431779712 is an abundant number, since it is smaller than the sum of its proper divisors (41421871386168).

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

25009431779712 is an equidigital number, since it uses as much as digits as its factorization.

25009431779712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65128728610 (or 65128728598 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 57.

The spelling of 25009431779712 in words is "twenty-five trillion, nine billion, four hundred thirty-one million, seven hundred seventy-nine thousand, seven hundred twelve".