13161311535 has 32 divisors (see below), whose sum is σ = 21809129472. Its totient is φ = 6773231360.

The previous prime is 13161311531. The next prime is 13161311563. The reversal of 13161311535 is 53511316131.

It is not a de Polignac number, because 13161311535 - 2² = 13161311531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161311531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81414 + ... + 181523.

It is an arithmetic number, because the mean of its divisors is an integer number (681535296).

Almost surely, 2^13161311535 is an apocalyptic number.

13161311535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13161311535 is a deficient number, since it is larger than the sum of its proper divisors (8647817937).

13161311535 is a wasteful number, since it uses less digits than its factorization.

13161311535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263063.

The product of its digits is 4050, while the sum is 30.

Adding to 13161311535 its reverse (53511316131), we get a palindrome (66672627666).

The spelling of 13161311535 in words is "thirteen billion, one hundred sixty-one million, three hundred eleven thousand, five hundred thirty-five".