16623801400 has 48 divisors (see below), whose sum is σ = 38906371440. Its totient is φ = 6605472000.

The previous prime is 16623801391. The next prime is 16623801401. The reversal of 16623801400 is 410832661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16623801401) 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 11 ways as a sum of consecutive naturals, for example, 245029 + ... + 305428.

It is an arithmetic number, because the mean of its divisors is an integer number (810549405).

Almost surely, 2^16623801400 is an apocalyptic number.

16623801400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16623801400 is an abundant number, since it is smaller than the sum of its proper divisors (22282570040).

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

16623801400 is a wasteful number, since it uses less digits than its factorization.

16623801400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550624 (or 550615 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 16623801400 in words is "sixteen billion, six hundred twenty-three million, eight hundred one thousand, four hundred".