13135646544 has 20 divisors (see below), whose sum is σ = 33933753696. Its totient is φ = 4378548832.

The previous prime is 13135646509. The next prime is 13135646567. The reversal of 13135646544 is 44564653131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13135646496 and 13135646505.

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, 136829604 + ... + 136829699.

Almost surely, 2^13135646544 is an apocalyptic number.

It is an amenable number.

13135646544 is an abundant number, since it is smaller than the sum of its proper divisors (20798107152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13135646544 is a wasteful number, since it uses less digits than its factorization.

13135646544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273659314 (or 273659308 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 13135646544 in words is "thirteen billion, one hundred thirty-five million, six hundred forty-six thousand, five hundred forty-four".