25257216576 has 56 divisors (see below), whose sum is σ = 67176359424. Its totient is φ = 8374981120.

The previous prime is 25257216539. The next prime is 25257216577. The reversal of 25257216576 is 67561275252.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (25257216577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307695 + ... + 381038.

Almost surely, 2^25257216576 is an apocalyptic number.

It is an amenable number.

25257216576 is an abundant number, since it is smaller than the sum of its proper divisors (41919142848).

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

25257216576 is a wasteful number, since it uses less digits than its factorization.

25257216576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688939 (or 688929 counting only the distinct ones).

The product of its digits is 1764000, while the sum is 48.

The spelling of 25257216576 in words is "twenty-five billion, two hundred fifty-seven million, two hundred sixteen thousand, five hundred seventy-six".