16320045644 has 24 divisors (see below), whose sum is σ = 33306218400. Its totient is φ = 6994304688.

The previous prime is 16320045629. The next prime is 16320045653. The reversal of 16320045644 is 44654002361.

It is a super-3 number, since 3×16320045644³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5946167 + ... + 5948910.

It is an arithmetic number, because the mean of its divisors is an integer number (1387759100).

Almost surely, 2^16320045644 is an apocalyptic number.

16320045644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16320045644 is an abundant number, since it is smaller than the sum of its proper divisors (16986172756).

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

16320045644 is a wasteful number, since it uses less digits than its factorization.

16320045644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11895102 (or 11895086 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 16320045644 in words is "sixteen billion, three hundred twenty million, forty-five thousand, six hundred forty-four".