25511502423 has 12 divisors (see below), whose sum is σ = 37388758904. Its totient is φ = 15461516400.

The previous prime is 25511502409. The next prime is 25511502427. The reversal of 25511502423 is 32420511552.

It is not a de Polignac number, because 25511502423 - 2³⁴ = 8331633239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25511502427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35139448 + ... + 35140173.

Almost surely, 2^25511502423 is an apocalyptic number.

25511502423 is a deficient number, since it is larger than the sum of its proper divisors (11877256481).

25511502423 is a wasteful number, since it uses less digits than its factorization.

25511502423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70279646 (or 70279635 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 25511502423 in words is "twenty-five billion, five hundred eleven million, five hundred two thousand, four hundred twenty-three".