25280647772 has 12 divisors (see below), whose sum is σ = 44242598400. Its totient is φ = 12639905376.

The previous prime is 25280647757. The next prime is 25280647829. The reversal of 25280647772 is 27774608252.

It is a super-2 number, since 2×25280647772² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25280647772.

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, 60104 + ... + 232752.

It is an arithmetic number, because the mean of its divisors is an integer number (3686883200).

Almost surely, 2^25280647772 is an apocalyptic number.

It is an amenable number.

25280647772 is a deficient number, since it is larger than the sum of its proper divisors (18961950628).

25280647772 is a wasteful number, since it uses less digits than its factorization.

25280647772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209260 (or 209258 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 50.

The spelling of 25280647772 in words is "twenty-five billion, two hundred eighty million, six hundred forty-seven thousand, seven hundred seventy-two".