25218681252 has 24 divisors (see below), whose sum is σ = 59183730816. Its totient is φ = 8357635488.

The previous prime is 25218681233. The next prime is 25218681253.

25218681252 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (25218681253) 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, 6071788 + ... + 6075939.

It is an arithmetic number, because the mean of its divisors is an integer number (2465988784).

Almost surely, 2^25218681252 is an apocalyptic number.

It is an amenable number.

25218681252 is an abundant number, since it is smaller than the sum of its proper divisors (33965049564).

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

25218681252 is a wasteful number, since it uses less digits than its factorization.

25218681252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12147907 (or 12147905 counting only the distinct ones).

The product of its digits is 153600, while the sum is 42.

The spelling of 25218681252 in words is "twenty-five billion, two hundred eighteen million, six hundred eighty-one thousand, two hundred fifty-two".