16380646643 has 8 divisors (see below), whose sum is σ = 17485643520. Its totient is φ = 15299935560.

The previous prime is 16380646637. The next prime is 16380646649. The reversal of 16380646643 is 34664608361.

It is an interprime number because it is at equal distance from previous prime (16380646637) and next prime (16380646649).

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

It is a cyclic number.

It is not a de Polignac number, because 16380646643 - 2³⁰ = 15306904819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16380646649) 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 7 ways as a sum of consecutive naturals, for example, 6070055 + ... + 6072752.

It is an arithmetic number, because the mean of its divisors is an integer number (2185705440).

Almost surely, 2^16380646643 is an apocalyptic number.

16380646643 is a deficient number, since it is larger than the sum of its proper divisors (1104996877).

16380646643 is a wasteful number, since it uses less digits than its factorization.

16380646643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12142897.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 16380646643 in words is "sixteen billion, three hundred eighty million, six hundred forty-six thousand, six hundred forty-three".