16436090861 has 2 divisors, whose sum is σ = 16436090862. Its totient is φ = 16436090860.

The previous prime is 16436090843. The next prime is 16436090887. The reversal of 16436090861 is 16809063461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10563933961 + 5872156900 = 102781^2 + 76630^2 .

It is a cyclic number.

It is not a de Polignac number, because 16436090861 - 2²⁶ = 16368981997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16436090761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8218045430 + 8218045431.

It is an arithmetic number, because the mean of its divisors is an integer number (8218045431).

Almost surely, 2^16436090861 is an apocalyptic number.

It is an amenable number.

16436090861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16436090861 is an equidigital number, since it uses as much as digits as its factorization.

16436090861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 16436090861 in words is "sixteen billion, four hundred thirty-six million, ninety thousand, eight hundred sixty-one".