13185868251988 has 12 divisors (see below), whose sum is σ = 23174304933780. Its totient is φ = 6564638270912.

The previous prime is 13185868251949. The next prime is 13185868252049. The reversal of 13185868251988 is 88915286858131.

It can be written as a sum of positive squares in 2 ways, for example, as 6472027584324 + 6713840667664 = 2544018^2 + 2591108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13185868251988.

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, 7073962723 + ... + 7073964586.

It is an arithmetic number, because the mean of its divisors is an integer number (1931192077815).

Almost surely, 2^{13185868251988} is an apocalyptic number.

It is an amenable number.

13185868251988 is a deficient number, since it is larger than the sum of its proper divisors (9988436681792).

13185868251988 is a wasteful number, since it uses less digits than its factorization.

13185868251988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14147927546 (or 14147927544 counting only the distinct ones).

The product of its digits is 265420800, while the sum is 73.

The spelling of 13185868251988 in words is "thirteen trillion, one hundred eighty-five billion, eight hundred sixty-eight million, two hundred fifty-one thousand, nine hundred eighty-eight".