16204244643 has 20 divisors (see below), whose sum is σ = 24240094560. Its totient is φ = 10787766192.

The previous prime is 16204244627. The next prime is 16204244669. The reversal of 16204244643 is 34644240261.

16204244643 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 4 + 2 + 4 + 4 + 643 = 666.

It is not a de Polignac number, because 16204244643 - 2⁴ = 16204244627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16204244598 and 16204244607.

It is not an unprimeable number, because it can be changed into a prime (16204240643) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80880 + ... + 197357.

It is an arithmetic number, because the mean of its divisors is an integer number (1212004728).

Almost surely, 2^16204244643 is an apocalyptic number.

16204244643 is a deficient number, since it is larger than the sum of its proper divisors (8035849917).

16204244643 is an equidigital number, since it uses as much as digits as its factorization.

16204244643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278968 (or 278959 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 16204244643 in words is "sixteen billion, two hundred four million, two hundred forty-four thousand, six hundred forty-three".