15513895913 has 2 divisors, whose sum is σ = 15513895914. Its totient is φ = 15513895912.

The previous prime is 15513895909. The next prime is 15513895919. The reversal of 15513895913 is 31959831551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15504483289 + 9412624 = 124517^2 + 3068^2 .

It is a cyclic number.

It is not a de Polignac number, because 15513895913 - 2² = 15513895909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15513895919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7756947956 + 7756947957.

It is an arithmetic number, because the mean of its divisors is an integer number (7756947957).

Almost surely, 2^15513895913 is an apocalyptic number.

It is an amenable number.

15513895913 is a deficient number, since it is larger than the sum of its proper divisors (1).

15513895913 is an equidigital number, since it uses as much as digits as its factorization.

15513895913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 50.

The spelling of 15513895913 in words is "fifteen billion, five hundred thirteen million, eight hundred ninety-five thousand, nine hundred thirteen".