16109386961 has 2 divisors, whose sum is σ = 16109386962. Its totient is φ = 16109386960.

The previous prime is 16109386919. The next prime is 16109387089. The reversal of 16109386961 is 16968390161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13586233600 + 2523153361 = 116560^2 + 50231^2 .

It is an emirp because it is prime and its reverse (16968390161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16109386961 - 2¹⁰ = 16109385937 is a prime.

It is not a weakly prime, because it can be changed into another prime (16109386261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8054693480 + 8054693481.

It is an arithmetic number, because the mean of its divisors is an integer number (8054693481).

Almost surely, 2^16109386961 is an apocalyptic number.

It is an amenable number.

16109386961 is a deficient number, since it is larger than the sum of its proper divisors (1).

16109386961 is an equidigital number, since it uses as much as digits as its factorization.

16109386961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 16109386961 in words is "sixteen billion, one hundred nine million, three hundred eighty-six thousand, nine hundred sixty-one".