13645990425601 has 4 divisors (see below), whose sum is σ = 14448695744772. Its totient is φ = 12843285106432.

The previous prime is 13645990425577. The next prime is 13645990425637. The reversal of 13645990425601 is 10652409954631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10197452289025 + 3448538136576 = 3193345^2 + 1857024^2 .

It is a cyclic number.

It is not a de Polignac number, because 13645990425601 - 2¹⁵ = 13645990392833 is a prime.

It is a super-2 number, since 2×13645990425601² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13645990405601) 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, 401352659560 + ... + 401352659593.

It is an arithmetic number, because the mean of its divisors is an integer number (3612173936193).

Almost surely, 2^{13645990425601} is an apocalyptic number.

It is an amenable number.

13645990425601 is a deficient number, since it is larger than the sum of its proper divisors (802705319171).

13645990425601 is an equidigital number, since it uses as much as digits as its factorization.

13645990425601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802705319170.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 13645990425601 in words is "thirteen trillion, six hundred forty-five billion, nine hundred ninety million, four hundred twenty-five thousand, six hundred one".