25390134556 has 12 divisors (see below), whose sum is σ = 44483176080. Its totient is φ = 12680655680.

The previous prime is 25390134547. The next prime is 25390134613. The reversal of 25390134556 is 65543109352.

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, 3598936 + ... + 3605983.

It is an arithmetic number, because the mean of its divisors is an integer number (3706931340).

Almost surely, 2^25390134556 is an apocalyptic number.

It is an amenable number.

25390134556 is a deficient number, since it is larger than the sum of its proper divisors (19093041524).

25390134556 is a wasteful number, since it uses less digits than its factorization.

25390134556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7205804 (or 7205802 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 25390134556 in words is "twenty-five billion, three hundred ninety million, one hundred thirty-four thousand, five hundred fifty-six".