16643311346 has 8 divisors (see below), whose sum is σ = 25053811164. Its totient is φ = 8292040960.

The previous prime is 16643311337. The next prime is 16643311387. The reversal of 16643311346 is 64311334661.

It can be written as a sum of positive squares in 2 ways, for example, as 14704230121 + 1939081225 = 121261^2 + 44035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14806655 + ... + 14807778.

Almost surely, 2^16643311346 is an apocalyptic number.

16643311346 is a deficient number, since it is larger than the sum of its proper divisors (8410499818).

16643311346 is a wasteful number, since it uses less digits than its factorization.

16643311346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29614716.

The product of its digits is 93312, while the sum is 38.

The spelling of 16643311346 in words is "sixteen billion, six hundred forty-three million, three hundred eleven thousand, three hundred forty-six".