13665645167680 has 56 divisors (see below), whose sum is σ = 35499619160640. Its totient is φ = 4969325514240.

The previous prime is 13665645167593. The next prime is 13665645167689. The reversal of 13665645167680 is 8676154656631.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (13665645167689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941139260 + ... + 1941146299.

Almost surely, 2^{13665645167680} is an apocalyptic number.

13665645167680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13665645167680 is an abundant number, since it is smaller than the sum of its proper divisors (21833973992960).

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

13665645167680 is a wasteful number, since it uses less digits than its factorization.

13665645167680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882285587 (or 3882285577 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 64.

The spelling of 13665645167680 in words is "thirteen trillion, six hundred sixty-five billion, six hundred forty-five million, one hundred sixty-seven thousand, six hundred eighty".