16631649411 has 24 divisors (see below), whose sum is σ = 25204430160. Its totient is φ = 9696176064.

The previous prime is 16631649403. The next prime is 16631649421. The reversal of 16631649411 is 11494613661.

It is not a de Polignac number, because 16631649411 - 2³ = 16631649403 is a prime.

It is a super-2 number, since 2×16631649411² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16631649401) 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 23 ways as a sum of consecutive naturals, for example, 576576 + ... + 604733.

It is an arithmetic number, because the mean of its divisors is an integer number (1050184590).

Almost surely, 2^16631649411 is an apocalyptic number.

16631649411 is a deficient number, since it is larger than the sum of its proper divisors (8572780749).

16631649411 is a wasteful number, since it uses less digits than its factorization.

16631649411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181363 (or 1181344 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The spelling of 16631649411 in words is "sixteen billion, six hundred thirty-one million, six hundred forty-nine thousand, four hundred eleven".