25570568464 has 45 divisors (see below), whose sum is σ = 57641718711. Its totient is φ = 10956896160.

The previous prime is 25570568461. The next prime is 25570568473. The reversal of 25570568464 is 46486507552.

The square root of 25570568464 is 159908.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×25570568464² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25570568461) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4474569 + ... + 4480279.

Almost surely, 2^25570568464 is an apocalyptic number.

25570568464 is the 159908-th square number.

It is an amenable number.

25570568464 is an abundant number, since it is smaller than the sum of its proper divisors (32071150247).

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

25570568464 is an frugal number, since it uses more digits than its factorization.

25570568464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11444 (or 5720 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 52.

The spelling of 25570568464 in words is "twenty-five billion, five hundred seventy million, five hundred sixty-eight thousand, four hundred sixty-four".