16961312089 has 2 divisors, whose sum is σ = 16961312090. Its totient is φ = 16961312088.

The previous prime is 16961312047. The next prime is 16961312101. The reversal of 16961312089 is 98021316961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8591806864 + 8369505225 = 92692^2 + 91485^2 .

It is a cyclic number.

It is not a de Polignac number, because 16961312089 - 2²⁵ = 16927757657 is a prime.

It is a super-2 number, since 2×16961312089² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16961312789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8480656044 + 8480656045.

It is an arithmetic number, because the mean of its divisors is an integer number (8480656045).

Almost surely, 2^16961312089 is an apocalyptic number.

It is an amenable number.

16961312089 is a deficient number, since it is larger than the sum of its proper divisors (1).

16961312089 is an equidigital number, since it uses as much as digits as its factorization.

16961312089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 16961312089 in words is "sixteen billion, nine hundred sixty-one million, three hundred twelve thousand, eighty-nine".