25814523516 has 12 divisors (see below), whose sum is σ = 60233888232. Its totient is φ = 8604841168.

The previous prime is 25814523499. The next prime is 25814523563. The reversal of 25814523516 is 61532541852.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075605135 + ... + 1075605158.

It is an arithmetic number, because the mean of its divisors is an integer number (5019490686).

Almost surely, 2^25814523516 is an apocalyptic number.

It is an amenable number.

25814523516 is an abundant number, since it is smaller than the sum of its proper divisors (34419364716).

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

25814523516 is a wasteful number, since it uses less digits than its factorization.

25814523516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151210300 (or 2151210298 counting only the distinct ones).

The product of its digits is 288000, while the sum is 42.

The spelling of 25814523516 in words is "twenty-five billion, eight hundred fourteen million, five hundred twenty-three thousand, five hundred sixteen".