16109075861 has 2 divisors, whose sum is σ = 16109075862. Its totient is φ = 16109075860.

The previous prime is 16109075837. The next prime is 16109075867. The reversal of 16109075861 is 16857090161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14119380625 + 1989695236 = 118825^2 + 44606^2 .

It is an emirp because it is prime and its reverse (16857090161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16109075861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16109075867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8054537930 + 8054537931.

It is an arithmetic number, because the mean of its divisors is an integer number (8054537931).

Almost surely, 2^16109075861 is an apocalyptic number.

It is an amenable number.

16109075861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16109075861 is an equidigital number, since it uses as much as digits as its factorization.

16109075861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The spelling of 16109075861 in words is "sixteen billion, one hundred nine million, seventy-five thousand, eight hundred sixty-one".