16615376825 has 6 divisors (see below), whose sum is σ = 20603067294. Its totient is φ = 13292301440.

The previous prime is 16615376797. The next prime is 16615376837. The reversal of 16615376825 is 52867351661.

It can be written as a sum of positive squares in 3 ways, for example, as 4850286736 + 11765090089 = 69644^2 + 108467^2 .

It is not a de Polignac number, because 16615376825 - 2¹² = 16615372729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 332307512 + ... + 332307561.

It is an arithmetic number, because the mean of its divisors is an integer number (3433844549).

Almost surely, 2^16615376825 is an apocalyptic number.

It is an amenable number.

16615376825 is a deficient number, since it is larger than the sum of its proper divisors (3987690469).

16615376825 is an equidigital number, since it uses as much as digits as its factorization.

16615376825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664615083 (or 664615078 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The spelling of 16615376825 in words is "sixteen billion, six hundred fifteen million, three hundred seventy-six thousand, eight hundred twenty-five".