13657785819 has 4 divisors (see below), whose sum is σ = 18210381096. Its totient is φ = 9105190544.

The previous prime is 13657785809. The next prime is 13657785859. The reversal of 13657785819 is 91858775631.

It is a happy number.

13657785819 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 is a cyclic number.

It is not a de Polignac number, because 13657785819 - 2⁸ = 13657785563 is a prime.

It is a super-2 number, since 2×13657785819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13657785809) by changing a digit.

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, 2276297634 + ... + 2276297639.

It is an arithmetic number, because the mean of its divisors is an integer number (4552595274).

Almost surely, 2^13657785819 is an apocalyptic number.

13657785819 is a deficient number, since it is larger than the sum of its proper divisors (4552595277).

13657785819 is an equidigital number, since it uses as much as digits as its factorization.

13657785819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552595276.

The product of its digits is 12700800, while the sum is 60.

The spelling of 13657785819 in words is "thirteen billion, six hundred fifty-seven million, seven hundred eighty-five thousand, eight hundred nineteen".