16205227949 has 2 divisors, whose sum is σ = 16205227950. Its totient is φ = 16205227948.

The previous prime is 16205227943. The next prime is 16205227963. The reversal of 16205227949 is 94972250261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15614251849 + 590976100 = 124957^2 + 24310^2 .

It is a cyclic number.

It is not a de Polignac number, because 16205227949 - 2²⁰ = 16204179373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16205227943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8102613974 + 8102613975.

It is an arithmetic number, because the mean of its divisors is an integer number (8102613975).

Almost surely, 2^16205227949 is an apocalyptic number.

It is an amenable number.

16205227949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16205227949 is an equidigital number, since it uses as much as digits as its factorization.

16205227949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 16205227949 in words is "sixteen billion, two hundred five million, two hundred twenty-seven thousand, nine hundred forty-nine".