18258564725 has 12 divisors (see below), whose sum is σ = 22950768036. Its totient is φ = 14406756480.

The previous prime is 18258564721. The next prime is 18258564733. The reversal of 18258564725 is 52746585281.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 17901361 + 18240663364 = 4231^2 + 135058^2 .

It is not a de Polignac number, because 18258564725 - 2² = 18258564721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18258564721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5000522 + ... + 5004171.

It is an arithmetic number, because the mean of its divisors is an integer number (1912564003).

Almost surely, 2^18258564725 is an apocalyptic number.

It is an amenable number.

18258564725 is a deficient number, since it is larger than the sum of its proper divisors (4692203311).

18258564725 is a wasteful number, since it uses less digits than its factorization.

18258564725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10004776 (or 10004771 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 53.

The spelling of 18258564725 in words is "eighteen billion, two hundred fifty-eight million, five hundred sixty-four thousand, seven hundred twenty-five".