13656831553 has 2 divisors, whose sum is σ = 13656831554. Its totient is φ = 13656831552.

The previous prime is 13656831547. The next prime is 13656831577. The reversal of 13656831553 is 35513865631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9222337089 + 4434494464 = 96033^2 + 66592^2 .

It is an emirp because it is prime and its reverse (35513865631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13656831553 - 2⁵ = 13656831521 is a prime.

It is not a weakly prime, because it can be changed into another prime (13656831053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6828415776 + 6828415777.

It is an arithmetic number, because the mean of its divisors is an integer number (6828415777).

Almost surely, 2^13656831553 is an apocalyptic number.

It is an amenable number.

13656831553 is a deficient number, since it is larger than the sum of its proper divisors (1).

13656831553 is an equidigital number, since it uses as much as digits as its factorization.

13656831553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 46.

The spelling of 13656831553 in words is "thirteen billion, six hundred fifty-six million, eight hundred thirty-one thousand, five hundred fifty-three".