13859396645 has 4 divisors (see below), whose sum is σ = 16631275980. Its totient is φ = 11087517312.

The previous prime is 13859396627. The next prime is 13859396653. The reversal of 13859396645 is 54669395831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54669395831 = 107 ⋅510928933.

It can be written as a sum of positive squares in 2 ways, for example, as 2653692196 + 11205704449 = 51514^2 + 105857^2 .

It is a cyclic number.

It is not a de Polignac number, because 13859396645 - 2¹⁸ = 13859134501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385939660 + ... + 1385939669.

It is an arithmetic number, because the mean of its divisors is an integer number (4157818995).

Almost surely, 2^13859396645 is an apocalyptic number.

It is an amenable number.

13859396645 is a deficient number, since it is larger than the sum of its proper divisors (2771879335).

13859396645 is an equidigital number, since it uses as much as digits as its factorization.

13859396645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771879334.

The product of its digits is 20995200, while the sum is 59.

The spelling of 13859396645 in words is "thirteen billion, eight hundred fifty-nine million, three hundred ninety-six thousand, six hundred forty-five".