16446422631 has 4 divisors (see below), whose sum is σ = 21928563512. Its totient is φ = 10964281752.

The previous prime is 16446422623. The next prime is 16446422647. The reversal of 16446422631 is 13622464461.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16446422631 - 2³ = 16446422623 is a prime.

It is a super-2 number, since 2×16446422631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16446422631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16446422611) 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 in 3 ways as a sum of consecutive naturals, for example, 2741070436 + ... + 2741070441.

It is an arithmetic number, because the mean of its divisors is an integer number (5482140878).

Almost surely, 2^16446422631 is an apocalyptic number.

16446422631 is a deficient number, since it is larger than the sum of its proper divisors (5482140881).

16446422631 is an equidigital number, since it uses as much as digits as its factorization.

16446422631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482140880.

The product of its digits is 165888, while the sum is 39.

The spelling of 16446422631 in words is "sixteen billion, four hundred forty-six million, four hundred twenty-two thousand, six hundred thirty-one".