16020881056 has 24 divisors (see below), whose sum is σ = 33396470100. Its totient is φ = 7539237888.

The previous prime is 16020881033. The next prime is 16020881059. The reversal of 16020881056 is 65018802061.

It can be written as a sum of positive squares in 2 ways, for example, as 13985427600 + 2035453456 = 118260^2 + 45116^2 .

It is a super-3 number, since 3×16020881056³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16020881059) 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, 14724531 + ... + 14725618.

Almost surely, 2^16020881056 is an apocalyptic number.

16020881056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16020881056 is an abundant number, since it is smaller than the sum of its proper divisors (17375589044).

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

16020881056 is a wasteful number, since it uses less digits than its factorization.

16020881056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29450176 (or 29450168 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 16020881056 in words is "sixteen billion, twenty million, eight hundred eighty-one thousand, fifty-six".