13146665636 has 12 divisors (see below), whose sum is σ = 24776408412. Its totient is φ = 6067691808.

The previous prime is 13146665629. The next prime is 13146665639. The reversal of 13146665636 is 63656664131.

It can be written as a sum of positive squares in 2 ways, for example, as 6337115236 + 6809550400 = 79606^2 + 82520^2 .

It is not an unprimeable number, because it can be changed into a prime (13146665639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126410195 + ... + 126410298.

It is an arithmetic number, because the mean of its divisors is an integer number (2064700701).

Almost surely, 2^13146665636 is an apocalyptic number.

It is an amenable number.

13146665636 is a deficient number, since it is larger than the sum of its proper divisors (11629742776).

13146665636 is a wasteful number, since it uses less digits than its factorization.

13146665636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252820510 (or 252820508 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 47.

The spelling of 13146665636 in words is "thirteen billion, one hundred forty-six million, six hundred sixty-five thousand, six hundred thirty-six".