16501220456 has 32 divisors (see below), whose sum is σ = 35405832000. Its totient is φ = 7062736896.

The previous prime is 16501220443. The next prime is 16501220473. The reversal of 16501220456 is 65402210561.

16501220456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148526 + ... + 234653.

It is an arithmetic number, because the mean of its divisors is an integer number (1106432250).

Almost surely, 2^16501220456 is an apocalyptic number.

It is an amenable number.

16501220456 is an abundant number, since it is smaller than the sum of its proper divisors (18904611544).

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

16501220456 is a wasteful number, since it uses less digits than its factorization.

16501220456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383961 (or 383957 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 16501220456 in words is "sixteen billion, five hundred one million, two hundred twenty thousand, four hundred fifty-six".