16623221760 has 528 divisors, whose sum is σ = 61802237952. Its totient is φ = 4279910400.

The previous prime is 16623221759. The next prime is 16623221807. The reversal of 16623221760 is 6712232661.

16623221760 is a `hidden beast` number, since 1 + 6 + 623 + 2 + 21 + 7 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38568745 + ... + 38569175.

Almost surely, 2^16623221760 is an apocalyptic number.

16623221760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16623221760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30901118976).

16623221760 is an abundant number, since it is smaller than the sum of its proper divisors (45179016192).

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

16623221760 is an equidigital number, since it uses as much as digits as its factorization.

16623221760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 16623221760 in words is "sixteen billion, six hundred twenty-three million, two hundred twenty-one thousand, seven hundred sixty".