16181970097 has 2 divisors, whose sum is σ = 16181970098. Its totient is φ = 16181970096.

The previous prime is 16181970073. The next prime is 16181970109. The reversal of 16181970097 is 79007918161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12273094656 + 3908875441 = 110784^2 + 62521^2 .

It is a cyclic number.

It is not a de Polignac number, because 16181970097 - 2¹⁵ = 16181937329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16181970097.

It is not a weakly prime, because it can be changed into another prime (16181970067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8090985048 + 8090985049.

It is an arithmetic number, because the mean of its divisors is an integer number (8090985049).

Almost surely, 2^16181970097 is an apocalyptic number.

It is an amenable number.

16181970097 is a deficient number, since it is larger than the sum of its proper divisors (1).

16181970097 is an equidigital number, since it uses as much as digits as its factorization.

16181970097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 49.

The spelling of 16181970097 in words is "sixteen billion, one hundred eighty-one million, nine hundred seventy thousand, ninety-seven".