13665764993 has 16 divisors (see below), whose sum is σ = 14829454080. Its totient is φ = 12545984256.

The previous prime is 13665764977. The next prime is 13665765011. The reversal of 13665764993 is 39946756631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13665764993 - 2⁴ = 13665764977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13665760993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50171 + ... + 172767.

It is an arithmetic number, because the mean of its divisors is an integer number (926840880).

Almost surely, 2^13665764993 is an apocalyptic number.

It is an amenable number.

13665764993 is a deficient number, since it is larger than the sum of its proper divisors (1163689087).

13665764993 is a wasteful number, since it uses less digits than its factorization.

13665764993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122776.

The product of its digits is 22044960, while the sum is 59.

The spelling of 13665764993 in words is "thirteen billion, six hundred sixty-five million, seven hundred sixty-four thousand, nine hundred ninety-three".