16220650447 has 4 divisors (see below), whose sum is σ = 16597874920. Its totient is φ = 15843425976.

The previous prime is 16220650423. The next prime is 16220650469. The reversal of 16220650447 is 74405602261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74405602261 = 17 ⋅4376800133.

It is a cyclic number.

It is not a de Polignac number, because 16220650447 - 2²³ = 16212261839 is a prime.

It is a super-2 number, since 2×16220650447² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220650547) 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 in 3 ways as a sum of consecutive naturals, for example, 188612172 + ... + 188612257.

It is an arithmetic number, because the mean of its divisors is an integer number (4149468730).

Almost surely, 2^16220650447 is an apocalyptic number.

16220650447 is a deficient number, since it is larger than the sum of its proper divisors (377224473).

16220650447 is an equidigital number, since it uses as much as digits as its factorization.

16220650447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377224472.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 16220650447 in words is "sixteen billion, two hundred twenty million, six hundred fifty thousand, four hundred forty-seven".