16385643804 has 24 divisors (see below), whose sum is σ = 38276492800. Its totient is φ = 5455692144.

The previous prime is 16385643803. The next prime is 16385643853. The reversal of 16385643804 is 40834658361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16385643803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762604 + ... + 783795.

Almost surely, 2^16385643804 is an apocalyptic number.

It is an amenable number.

16385643804 is an abundant number, since it is smaller than the sum of its proper divisors (21890848996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16385643804 is a wasteful number, since it uses less digits than its factorization.

16385643804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547289 (or 1547287 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 16385643804 in words is "sixteen billion, three hundred eighty-five million, six hundred forty-three thousand, eight hundred four".