16161064081 has 2 divisors, whose sum is σ = 16161064082. Its totient is φ = 16161064080.

The previous prime is 16161063953. The next prime is 16161064123. The reversal of 16161064081 is 18046016161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11231760400 + 4929303681 = 105980^2 + 70209^2 .

It is an emirp because it is prime and its reverse (18046016161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16161064081 - 2⁷ = 16161063953 is a prime.

It is a super-2 number, since 2×16161064081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16161064481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8080532040 + 8080532041.

It is an arithmetic number, because the mean of its divisors is an integer number (8080532041).

Almost surely, 2^16161064081 is an apocalyptic number.

It is an amenable number.

16161064081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16161064081 is an equidigital number, since it uses as much as digits as its factorization.

16161064081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 16161064081 in words is "sixteen billion, one hundred sixty-one million, sixty-four thousand, eighty-one".