16397636897 has 2 divisors, whose sum is σ = 16397636898. Its totient is φ = 16397636896.

The previous prime is 16397636873. The next prime is 16397636921. The reversal of 16397636897 is 79863679361.

It is a balanced prime because it is at equal distance from previous prime (16397636873) and next prime (16397636921).

It can be written as a sum of positive squares in only one way, i.e., 8349573376 + 8048063521 = 91376^2 + 89711^2 .

It is a cyclic number.

It is not a de Polignac number, because 16397636897 - 2¹⁴ = 16397620513 is a prime.

It is not a weakly prime, because it can be changed into another prime (16397636197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8198818448 + 8198818449.

It is an arithmetic number, because the mean of its divisors is an integer number (8198818449).

Almost surely, 2^16397636897 is an apocalyptic number.

It is an amenable number.

16397636897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16397636897 is an equidigital number, since it uses as much as digits as its factorization.

16397636897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61725888, while the sum is 65.

The spelling of 16397636897 in words is "sixteen billion, three hundred ninety-seven million, six hundred thirty-six thousand, eight hundred ninety-seven".