13087915826 has 12 divisors (see below), whose sum is σ = 19854959082. Its totient is φ = 6470422464.

The previous prime is 13087915781. The next prime is 13087915829. The reversal of 13087915826 is 62851978031.

13087915826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 5654889601 + 7433026225 = 75199^2 + 86215^2 .

It is a super-2 number, since 2×13087915826² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13087915829) 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 5 ways as a sum of consecutive naturals, for example, 397235 + ... + 428918.

Almost surely, 2^13087915826 is an apocalyptic number.

13087915826 is a deficient number, since it is larger than the sum of its proper divisors (6767043256).

13087915826 is an frugal number, since it uses more digits than its factorization.

13087915826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826333 (or 826244 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 13087915826 in words is "thirteen billion, eighty-seven million, nine hundred fifteen thousand, eight hundred twenty-six".