16442040049 has 2 divisors, whose sum is σ = 16442040050. Its totient is φ = 16442040048.

The previous prime is 16442040037. The next prime is 16442040091. The reversal of 16442040049 is 94004024461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11004010000 + 5438030049 = 104900^2 + 73743^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442040049 - 2⁷ = 16442039921 is a prime.

It is a super-3 number, since 3×16442040049³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16442039996 and 16442040023.

It is not a weakly prime, because it can be changed into another prime (16442040019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221020024 + 8221020025.

It is an arithmetic number, because the mean of its divisors is an integer number (8221020025).

Almost surely, 2^16442040049 is an apocalyptic number.

It is an amenable number.

16442040049 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442040049 is an equidigital number, since it uses as much as digits as its factorization.

16442040049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 16442040049 in words is "sixteen billion, four hundred forty-two million, forty thousand, forty-nine".