13600665540 has 144 divisors (see below), whose sum is σ = 51435296640. Its totient is φ = 2826109440.

The previous prime is 13600665503. The next prime is 13600665541. The reversal of 13600665540 is 4556600631.

13600665540 is a `hidden beast` number, since 1 + 3 + 600 + 6 + 6 + 5 + 5 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13600665495 and 13600665504.

It is not an unprimeable number, because it can be changed into a prime (13600665541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 476785 + ... + 504504.

It is an arithmetic number, because the mean of its divisors is an integer number (357189560).

Almost surely, 2^13600665540 is an apocalyptic number.

13600665540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13600665540 is an abundant number, since it is smaller than the sum of its proper divisors (37834631100).

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

13600665540 is a wasteful number, since it uses less digits than its factorization.

13600665540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981322 (or 981317 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 13600665540 in words is "thirteen billion, six hundred million, six hundred sixty-five thousand, five hundred forty".