13893724645 has 4 divisors (see below), whose sum is σ = 16672469580. Its totient is φ = 11114979712.

The previous prime is 13893724613. The next prime is 13893724651. The reversal of 13893724645 is 54642739831.

It is a happy number.

13893724645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3551444836 + 10342279809 = 59594^2 + 101697^2 .

It is a cyclic number.

It is not a de Polignac number, because 13893724645 - 2⁵ = 13893724613 is a prime.

It is a super-2 number, since 2×13893724645² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13893724592 and 13893724601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389372460 + ... + 1389372469.

It is an arithmetic number, because the mean of its divisors is an integer number (4168117395).

Almost surely, 2^13893724645 is an apocalyptic number.

It is an amenable number.

13893724645 is a deficient number, since it is larger than the sum of its proper divisors (2778744935).

13893724645 is an equidigital number, since it uses as much as digits as its factorization.

13893724645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778744934.

The product of its digits is 4354560, while the sum is 52.

The spelling of 13893724645 in words is "thirteen billion, eight hundred ninety-three million, seven hundred twenty-four thousand, six hundred forty-five".