16320905540 has 12 divisors (see below), whose sum is σ = 34273901676. Its totient is φ = 6528362208.

The previous prime is 16320905537. The next prime is 16320905543. The reversal of 16320905540 is 4550902361.

It is an interprime number because it is at equal distance from previous prime (16320905537) and next prime (16320905543).

It can be written as a sum of positive squares in 2 ways, for example, as 3618263104 + 12702642436 = 60152^2 + 112706^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16320905540.

It is not an unprimeable number, because it can be changed into a prime (16320905543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408022619 + ... + 408022658.

It is an arithmetic number, because the mean of its divisors is an integer number (2856158473).

Almost surely, 2^16320905540 is an apocalyptic number.

16320905540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16320905540 is an abundant number, since it is smaller than the sum of its proper divisors (17952996136).

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

16320905540 is a wasteful number, since it uses less digits than its factorization.

16320905540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816045286 (or 816045284 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 16320905540 in words is "sixteen billion, three hundred twenty million, nine hundred five thousand, five hundred forty".