16631044847 has 4 divisors (see below), whose sum is σ = 16944838200. Its totient is φ = 16317251496.

The previous prime is 16631044823. The next prime is 16631044867. The reversal of 16631044847 is 74844013661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16631044847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16631044798 and 16631044807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16631044867) 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, 156896597 + ... + 156896702.

It is an arithmetic number, because the mean of its divisors is an integer number (4236209550).

Almost surely, 2^16631044847 is an apocalyptic number.

16631044847 is a deficient number, since it is larger than the sum of its proper divisors (313793353).

16631044847 is an equidigital number, since it uses as much as digits as its factorization.

16631044847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313793352.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 16631044847 in words is "sixteen billion, six hundred thirty-one million, forty-four thousand, eight hundred forty-seven".