13540543636 has 12 divisors (see below), whose sum is σ = 23709481012. Its totient is φ = 6766406208.

The previous prime is 13540543619. The next prime is 13540543703. The reversal of 13540543636 is 63634504531.

It can be written as a sum of positive squares in 2 ways, for example, as 1682640400 + 11857903236 = 41020^2 + 108894^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 958515 + ... + 972538.

Almost surely, 2^13540543636 is an apocalyptic number.

It is an amenable number.

13540543636 is a deficient number, since it is larger than the sum of its proper divisors (10168937376).

13540543636 is a wasteful number, since it uses less digits than its factorization.

13540543636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932810 (or 1932808 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 13540543636 in words is "thirteen billion, five hundred forty million, five hundred forty-three thousand, six hundred thirty-six".