25897478160 has 80 divisors (see below), whose sum is σ = 80689853376. Its totient is φ = 6870925824.

The previous prime is 25897478137. The next prime is 25897478161. The reversal of 25897478160 is 6187479852.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 25897478160.

It is not an unprimeable number, because it can be changed into a prime (25897478161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226594 + ... + 321153.

Almost surely, 2^25897478160 is an apocalyptic number.

25897478160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25897478160 is an abundant number, since it is smaller than the sum of its proper divisors (54792375216).

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

25897478160 is a wasteful number, since it uses less digits than its factorization.

25897478160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547960 (or 547954 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 25897478160 in words is "twenty-five billion, eight hundred ninety-seven million, four hundred seventy-eight thousand, one hundred sixty".