16113101561 has 2 divisors, whose sum is σ = 16113101562. Its totient is φ = 16113101560.

The previous prime is 16113101549. The next prime is 16113101567. The reversal of 16113101561 is 16510131161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16017433600 + 95667961 = 126560^2 + 9781^2 .

It is an emirp because it is prime and its reverse (16510131161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16113101561 - 2³⁰ = 15039359737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16113101561.

It is not a weakly prime, because it can be changed into another prime (16113101567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8056550780 + 8056550781.

It is an arithmetic number, because the mean of its divisors is an integer number (8056550781).

Almost surely, 2^16113101561 is an apocalyptic number.

It is an amenable number.

16113101561 is a deficient number, since it is larger than the sum of its proper divisors (1).

16113101561 is an equidigital number, since it uses as much as digits as its factorization.

16113101561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 26.

The spelling of 16113101561 in words is "sixteen billion, one hundred thirteen million, one hundred one thousand, five hundred sixty-one".