16442689297 has 2 divisors, whose sum is σ = 16442689298. Its totient is φ = 16442689296.

The previous prime is 16442689273. The next prime is 16442689301. The reversal of 16442689297 is 79298624461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12902915281 + 3539774016 = 113591^2 + 59496^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442689297 - 2⁷ = 16442689169 is a prime.

It is a super-3 number, since 3×16442689297³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16442689097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221344648 + 8221344649.

It is an arithmetic number, because the mean of its divisors is an integer number (8221344649).

Almost surely, 2^16442689297 is an apocalyptic number.

It is an amenable number.

16442689297 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442689297 is an equidigital number, since it uses as much as digits as its factorization.

16442689297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 58.

The spelling of 16442689297 in words is "sixteen billion, four hundred forty-two million, six hundred eighty-nine thousand, two hundred ninety-seven".