13706921165601 has 4 divisors (see below), whose sum is σ = 18275894887472. Its totient is φ = 9137947443732.

The previous prime is 13706921165533. The next prime is 13706921165603. The reversal of 13706921165601 is 10656112960731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13706921165601 - 2²¹ = 13706919068449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13706921165603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2284486860931 + ... + 2284486860936.

It is an arithmetic number, because the mean of its divisors is an integer number (4568973721868).

Almost surely, 2^{13706921165601} is an apocalyptic number.

It is an amenable number.

13706921165601 is a deficient number, since it is larger than the sum of its proper divisors (4568973721871).

13706921165601 is an equidigital number, since it uses as much as digits as its factorization.

13706921165601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568973721870.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 13706921165601 in words is "thirteen trillion, seven hundred six billion, nine hundred twenty-one million, one hundred sixty-five thousand, six hundred one".