16005602120 has 32 divisors (see below), whose sum is σ = 36602980920. Its totient is φ = 6297285120.

The previous prime is 16005602113. The next prime is 16005602131. The reversal of 16005602120 is 2120650061.

It can be written as a sum of positive squares in 4 ways, for example, as 10591291396 + 5414310724 = 102914^2 + 73582^2 .

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, 3277397 + ... + 3282276.

Almost surely, 2^16005602120 is an apocalyptic number.

16005602120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16005602120 is an abundant number, since it is smaller than the sum of its proper divisors (20597378800).

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

16005602120 is a wasteful number, since it uses less digits than its factorization.

16005602120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559745 (or 6559741 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 16005602120 in words is "sixteen billion, five million, six hundred two thousand, one hundred twenty".