16111138913 has 2 divisors, whose sum is σ = 16111138914. Its totient is φ = 16111138912.

The previous prime is 16111138889. The next prime is 16111138931. The reversal of 16111138913 is 31983111161.

Together with next prime (16111138931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11877294289 + 4233844624 = 108983^2 + 65068^2 .

It is a cyclic number.

It is not a de Polignac number, because 16111138913 - 2⁸ = 16111138657 is a prime.

It is not a weakly prime, because it can be changed into another prime (16111138933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8055569456 + 8055569457.

It is an arithmetic number, because the mean of its divisors is an integer number (8055569457).

Almost surely, 2^16111138913 is an apocalyptic number.

It is an amenable number.

16111138913 is a deficient number, since it is larger than the sum of its proper divisors (1).

16111138913 is an equidigital number, since it uses as much as digits as its factorization.

16111138913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 35.

The spelling of 16111138913 in words is "sixteen billion, one hundred eleven million, one hundred thirty-eight thousand, nine hundred thirteen".