16215820469 has 2 divisors, whose sum is σ = 16215820470. Its totient is φ = 16215820468.

The previous prime is 16215820463. The next prime is 16215820483. The reversal of 16215820469 is 96402851261.

16215820469 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., 10017407569 + 6198412900 = 100087^2 + 78730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16215820469 is a prime.

It is a super-2 number, since 2×16215820469² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16215820463) 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, 8107910234 + 8107910235.

It is an arithmetic number, because the mean of its divisors is an integer number (8107910235).

Almost surely, 2^16215820469 is an apocalyptic number.

It is an amenable number.

16215820469 is a deficient number, since it is larger than the sum of its proper divisors (1).

16215820469 is an equidigital number, since it uses as much as digits as its factorization.

16215820469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 16215820469 in words is "sixteen billion, two hundred fifteen million, eight hundred twenty thousand, four hundred sixty-nine".