13356855997 has 4 divisors (see below), whose sum is σ = 13357243260. Its totient is φ = 13356468736.

The previous prime is 13356855973. The next prime is 13356856027. The reversal of 13356855997 is 79955865331.

13356855997 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, and also an emirpimes, since its reverse is a distinct semiprime: 79955865331 = 101 ⋅791642231.

It can be written as a sum of positive squares in 2 ways, for example, as 9425691396 + 3931164601 = 97086^2 + 62699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13356855997 is a prime.

It is a super-3 number, since 3×13356855997³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13356855907) 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, 136222 + ... + 212767.

It is an arithmetic number, because the mean of its divisors is an integer number (3339310815).

Almost surely, 2^13356855997 is an apocalyptic number.

It is an amenable number.

13356855997 is a deficient number, since it is larger than the sum of its proper divisors (387263).

13356855997 is an equidigital number, since it uses as much as digits as its factorization.

13356855997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387262.

The product of its digits is 30618000, while the sum is 61.

The spelling of 13356855997 in words is "thirteen billion, three hundred fifty-six million, eight hundred fifty-five thousand, nine hundred ninety-seven".