25919947608 has 16 divisors (see below), whose sum is σ = 64799869080. Its totient is φ = 8639982528.

The previous prime is 25919947561. The next prime is 25919947621. The reversal of 25919947608 is 80674991952.

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, 539998885 + ... + 539998932.

Almost surely, 2^25919947608 is an apocalyptic number.

It is an amenable number.

25919947608 is an abundant number, since it is smaller than the sum of its proper divisors (38879921472).

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

25919947608 is a wasteful number, since it uses less digits than its factorization.

25919947608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079997826 (or 1079997822 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 60.

The spelling of 25919947608 in words is "twenty-five billion, nine hundred nineteen million, nine hundred forty-seven thousand, six hundred eight".