13065535856 has 20 divisors (see below), whose sum is σ = 25352110992. Its totient is φ = 6523055616.

The previous prime is 13065535829. The next prime is 13065535891. The reversal of 13065535856 is 65853556031.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13065535856.

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, 595916 + ... + 617451.

Almost surely, 2^13065535856 is an apocalyptic number.

13065535856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13065535856 is a deficient number, since it is larger than the sum of its proper divisors (12286575136).

13065535856 is a wasteful number, since it uses less digits than its factorization.

13065535856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214048 (or 1214042 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 13065535856 in words is "thirteen billion, sixty-five million, five hundred thirty-five thousand, eight hundred fifty-six".