16411521197 has 2 divisors, whose sum is σ = 16411521198. Its totient is φ = 16411521196.

The previous prime is 16411521151. The next prime is 16411521211. The reversal of 16411521197 is 79112511461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12257589796 + 4153931401 = 110714^2 + 64451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16411521197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16411521197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16411524197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8205760598 + 8205760599.

It is an arithmetic number, because the mean of its divisors is an integer number (8205760599).

Almost surely, 2^16411521197 is an apocalyptic number.

It is an amenable number.

16411521197 is a deficient number, since it is larger than the sum of its proper divisors (1).

16411521197 is an equidigital number, since it uses as much as digits as its factorization.

16411521197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 38.

The spelling of 16411521197 in words is "sixteen billion, four hundred eleven million, five hundred twenty-one thousand, one hundred ninety-seven".