16133798728 has 32 divisors (see below), whose sum is σ = 32036225760. Its totient is φ = 7590979840.

The previous prime is 16133798701. The next prime is 16133798731. The reversal of 16133798728 is 82789733161.

It is a happy number.

It is a super-2 number, since 2×16133798728² (a number of 21 digits) contains 22 as substring.

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, 1399275 + ... + 1410757.

It is an arithmetic number, because the mean of its divisors is an integer number (1001132055).

Almost surely, 2^16133798728 is an apocalyptic number.

It is an amenable number.

16133798728 is a deficient number, since it is larger than the sum of its proper divisors (15902427032).

16133798728 is a wasteful number, since it uses less digits than its factorization.

16133798728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21837 (or 21833 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 55.

The spelling of 16133798728 in words is "sixteen billion, one hundred thirty-three million, seven hundred ninety-eight thousand, seven hundred twenty-eight".