16155501728 has 12 divisors (see below), whose sum is σ = 31806144090. Its totient is φ = 8077750848.

The previous prime is 16155501721. The next prime is 16155501779. The reversal of 16155501728 is 82710555161.

It can be written as a sum of positive squares in only one way, i.e., 10029621904 + 6125879824 = 100148^2 + 78268^2 .

It is a super-2 number, since 2×16155501728² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16155501721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252429683 + ... + 252429746.

Almost surely, 2^16155501728 is an apocalyptic number.

It is an amenable number.

16155501728 is a deficient number, since it is larger than the sum of its proper divisors (15650642362).

16155501728 is an equidigital number, since it uses as much as digits as its factorization.

16155501728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504859439 (or 504859431 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 41.

The spelling of 16155501728 in words is "sixteen billion, one hundred fifty-five million, five hundred one thousand, seven hundred twenty-eight".