16444013393 has 2 divisors, whose sum is σ = 16444013394. Its totient is φ = 16444013392.

The previous prime is 16444013279. The next prime is 16444013407. The reversal of 16444013393 is 39331044461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15503487169 + 940526224 = 124513^2 + 30668^2 .

It is a cyclic number.

It is not a de Polignac number, because 16444013393 - 2¹² = 16444009297 is a prime.

It is a super-3 number, since 3×16444013393³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16444019393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8222006696 + 8222006697.

It is an arithmetic number, because the mean of its divisors is an integer number (8222006697).

Almost surely, 2^16444013393 is an apocalyptic number.

It is an amenable number.

16444013393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16444013393 is an equidigital number, since it uses as much as digits as its factorization.

16444013393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 16444013393 in words is "sixteen billion, four hundred forty-four million, thirteen thousand, three hundred ninety-three".