16335721320 has 32 divisors (see below), whose sum is σ = 49007164320. Its totient is φ = 4356192320.

The previous prime is 16335721313. The next prime is 16335721331. The reversal of 16335721320 is 2312753361.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68065386 + ... + 68065625.

It is an arithmetic number, because the mean of its divisors is an integer number (1531473885).

Almost surely, 2^16335721320 is an apocalyptic number.

16335721320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16335721320 is an abundant number, since it is smaller than the sum of its proper divisors (32671443000).

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

16335721320 is a wasteful number, since it uses less digits than its factorization.

16335721320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136131025 (or 136131021 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 33.

The spelling of 16335721320 in words is "sixteen billion, three hundred thirty-five million, seven hundred twenty-one thousand, three hundred twenty".