16449996397 has 2 divisors, whose sum is σ = 16449996398. Its totient is φ = 16449996396.

The previous prime is 16449996383. The next prime is 16449996401. The reversal of 16449996397 is 79369994461.

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., 12202737156 + 4247259241 = 110466^2 + 65171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16449996397 is a prime.

It is a super-2 number, since 2×16449996397² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16449996307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8224998198 + 8224998199.

It is an arithmetic number, because the mean of its divisors is an integer number (8224998199).

Almost surely, 2^16449996397 is an apocalyptic number.

It is an amenable number.

16449996397 is a deficient number, since it is larger than the sum of its proper divisors (1).

16449996397 is an equidigital number, since it uses as much as digits as its factorization.

16449996397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79361856, while the sum is 67.

The spelling of 16449996397 in words is "sixteen billion, four hundred forty-nine million, nine hundred ninety-six thousand, three hundred ninety-seven".