16513806525128 has 32 divisors (see below), whose sum is σ = 33886158377760. Its totient is φ = 7482293969280.

The previous prime is 16513806525109. The next prime is 16513806525133. The reversal of 16513806525128 is 82152560831561.

It is a super-2 number, since 2×16513806525128² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16513806525128.

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, 299743850 + ... + 299798937.

It is an arithmetic number, because the mean of its divisors is an integer number (1058942449305).

Almost surely, 2^{16513806525128} is an apocalyptic number.

It is an amenable number.

16513806525128 is an abundant number, since it is smaller than the sum of its proper divisors (17372351852632).

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

16513806525128 is a wasteful number, since it uses less digits than its factorization.

16513806525128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599543117 (or 599543113 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 16513806525128 in words is "sixteen trillion, five hundred thirteen billion, eight hundred six million, five hundred twenty-five thousand, one hundred twenty-eight".