16621300459 has 2 divisors, whose sum is σ = 16621300460. Its totient is φ = 16621300458.

The previous prime is 16621300393. The next prime is 16621300481. The reversal of 16621300459 is 95400312661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16621300459 - 2²⁹ = 16084429547 is a prime.

It is a super-2 number, since 2×16621300459² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16621370459) 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, 8310650229 + 8310650230.

It is an arithmetic number, because the mean of its divisors is an integer number (8310650230).

Almost surely, 2^16621300459 is an apocalyptic number.

16621300459 is a deficient number, since it is larger than the sum of its proper divisors (1).

16621300459 is an equidigital number, since it uses as much as digits as its factorization.

16621300459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 16621300459 in words is "sixteen billion, six hundred twenty-one million, three hundred thousand, four hundred fifty-nine".