18631402872725 has 12 divisors (see below), whose sum is σ = 23899592651460. Its totient is φ = 14391152563200.

The previous prime is 18631402872703. The next prime is 18631402872809. The reversal of 18631402872725 is 52727820413681.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 453314037796 + 18178088834929 = 673286^2 + 4263577^2 .

It is not a de Polignac number, because 18631402872725 - 2⁸ = 18631402872469 is a prime.

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, 12849242636 + ... + 12849244085.

It is an arithmetic number, because the mean of its divisors is an integer number (1991632720955).

Almost surely, 2^{18631402872725} is an apocalyptic number.

It is an amenable number.

18631402872725 is a deficient number, since it is larger than the sum of its proper divisors (5268189778735).

18631402872725 is a wasteful number, since it uses less digits than its factorization.

18631402872725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25698486760 (or 25698486755 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 18631402872725 in words is "eighteen trillion, six hundred thirty-one billion, four hundred two million, eight hundred seventy-two thousand, seven hundred twenty-five".