16445156549 has 2 divisors, whose sum is σ = 16445156550. Its totient is φ = 16445156548.

The previous prime is 16445156537. The next prime is 16445156579. The reversal of 16445156549 is 94565154461.

16445156549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16216239649 + 228916900 = 127343^2 + 15130^2 .

It is a cyclic number.

It is not a de Polignac number, because 16445156549 - 2³² = 12150189253 is a prime.

It is a super-2 number, since 2×16445156549² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16445156497 and 16445156506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16445156579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8222578274 + 8222578275.

It is an arithmetic number, because the mean of its divisors is an integer number (8222578275).

Almost surely, 2^16445156549 is an apocalyptic number.

It is an amenable number.

16445156549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16445156549 is an equidigital number, since it uses as much as digits as its factorization.

16445156549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592000, while the sum is 50.

The spelling of 16445156549 in words is "sixteen billion, four hundred forty-five million, one hundred fifty-six thousand, five hundred forty-nine".