13581928369 has 2 divisors, whose sum is σ = 13581928370. Its totient is φ = 13581928368.

The previous prime is 13581928361. The next prime is 13581928391. The reversal of 13581928369 is 96382918531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10022612769 + 3559315600 = 100113^2 + 59660^2 .

It is a cyclic number.

It is not a de Polignac number, because 13581928369 - 2³ = 13581928361 is a prime.

It is a super-2 number, since 2×13581928369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13581928361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6790964184 + 6790964185.

It is an arithmetic number, because the mean of its divisors is an integer number (6790964185).

Almost surely, 2^13581928369 is an apocalyptic number.

It is an amenable number.

13581928369 is a deficient number, since it is larger than the sum of its proper divisors (1).

13581928369 is an equidigital number, since it uses as much as digits as its factorization.

13581928369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 55.

It can be divided in two parts, 1358192 and 8369, that added together give a square (1366561 = 1169²).

The spelling of 13581928369 in words is "thirteen billion, five hundred eighty-one million, nine hundred twenty-eight thousand, three hundred sixty-nine".