16115111513 has 2 divisors, whose sum is σ = 16115111514. Its totient is φ = 16115111512.

The previous prime is 16115111477. The next prime is 16115111527. The reversal of 16115111513 is 31511151161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16066069504 + 49042009 = 126752^2 + 7003^2 .

It is a cyclic number.

It is not a de Polignac number, because 16115111513 - 2²⁸ = 15846676057 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 (16115111113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8057555756 + 8057555757.

It is an arithmetic number, because the mean of its divisors is an integer number (8057555757).

Almost surely, 2^16115111513 is an apocalyptic number.

It is an amenable number.

16115111513 is a deficient number, since it is larger than the sum of its proper divisors (1).

16115111513 is an equidigital number, since it uses as much as digits as its factorization.

16115111513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 26.

Adding to 16115111513 its reverse (31511151161), we get a palindrome (47626262674).

The spelling of 16115111513 in words is "sixteen billion, one hundred fifteen million, one hundred eleven thousand, five hundred thirteen".