16440450293 has 2 divisors, whose sum is σ = 16440450294. Its totient is φ = 16440450292.

The previous prime is 16440450281. The next prime is 16440450307. The reversal of 16440450293 is 39205404461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16302693124 + 137757169 = 127682^2 + 11737^2 .

It is an emirp because it is prime and its reverse (39205404461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16440450293 - 2²² = 16436255989 is a prime.

It is a super-3 number, since 3×16440450293³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16440450263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8220225146 + 8220225147.

It is an arithmetic number, because the mean of its divisors is an integer number (8220225147).

Almost surely, 2^16440450293 is an apocalyptic number.

It is an amenable number.

16440450293 is a deficient number, since it is larger than the sum of its proper divisors (1).

16440450293 is an equidigital number, since it uses as much as digits as its factorization.

16440450293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 16440450293 in words is "sixteen billion, four hundred forty million, four hundred fifty thousand, two hundred ninety-three".