16720335552 has 28 divisors (see below), whose sum is σ = 44239221656. Its totient is φ = 5573445120.

The previous prime is 16720335539. The next prime is 16720335581. The reversal of 16720335552 is 25553302761.

It is a self number, because there is not a number n which added to its sum of digits gives 16720335552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43542349 + ... + 43542732.

It is an arithmetic number, because the mean of its divisors is an integer number (1579972202).

Almost surely, 2^16720335552 is an apocalyptic number.

16720335552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16720335552 is an abundant number, since it is smaller than the sum of its proper divisors (27518886104).

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

16720335552 is an equidigital number, since it uses as much as digits as its factorization.

16720335552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87085096 (or 87085086 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 39.

The spelling of 16720335552 in words is "sixteen billion, seven hundred twenty million, three hundred thirty-five thousand, five hundred fifty-two".