16005345720 has 128 divisors (see below), whose sum is σ = 59096701440. Its totient is φ = 3376949760.

The previous prime is 16005345701. The next prime is 16005345779. The reversal of 16005345720 is 2754350061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721926 + ... + 743765.

It is an arithmetic number, because the mean of its divisors is an integer number (461692980).

Almost surely, 2^16005345720 is an apocalyptic number.

16005345720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16005345720 is an abundant number, since it is smaller than the sum of its proper divisors (43091355720).

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

16005345720 is a wasteful number, since it uses less digits than its factorization.

16005345720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465725 (or 1465721 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

Adding to 16005345720 its reverse (2754350061), we get a palindrome (18759695781).

The spelling of 16005345720 in words is "sixteen billion, five million, three hundred forty-five thousand, seven hundred twenty".