13205356553 has 4 divisors (see below), whose sum is σ = 13211680020. Its totient is φ = 13199033088.

The previous prime is 13205356519. The next prime is 13205356583. The reversal of 13205356553 is 35565350231.

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 8503237369 + 4702119184 = 92213^2 + 68572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13205356553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13205356583) 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, 3158600 + ... + 3162777.

It is an arithmetic number, because the mean of its divisors is an integer number (3302920005).

Almost surely, 2^13205356553 is an apocalyptic number.

It is an amenable number.

13205356553 is a deficient number, since it is larger than the sum of its proper divisors (6323467).

13205356553 is an equidigital number, since it uses as much as digits as its factorization.

13205356553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323466.

The product of its (nonzero) digits is 202500, while the sum is 38.

The spelling of 13205356553 in words is "thirteen billion, two hundred five million, three hundred fifty-six thousand, five hundred fifty-three".