25681818652 has 36 divisors (see below), whose sum is σ = 52299410184. Its totient is φ = 11002585440.

The previous prime is 25681818641. The next prime is 25681818713.

25681818652 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 25681818652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 568398 + ... + 611914.

It is an arithmetic number, because the mean of its divisors is an integer number (1452761394).

Almost surely, 2^25681818652 is an apocalyptic number.

It is an amenable number.

25681818652 is an abundant number, since it is smaller than the sum of its proper divisors (26617591532).

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

25681818652 is a wasteful number, since it uses less digits than its factorization.

25681818652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46546 (or 46537 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 52.

The spelling of 25681818652 in words is "twenty-five billion, six hundred eighty-one million, eight hundred eighteen thousand, six hundred fifty-two".