16500402637625 has 16 divisors (see below), whose sum is σ = 20612911472400. Its totient is φ = 13187239430400.

The previous prime is 16500402637619. The next prime is 16500402637627. The reversal of 16500402637625 is 52673620400561.

It can be written as a sum of positive squares in 8 ways, for example, as 1778539637161 + 14721863000464 = 1333619^2 + 3836908^2 .

It is not a de Polignac number, because 16500402637625 - 2⁴² = 12102356126521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16500402637625.

It is not an unprimeable number, because it can be changed into a prime (16500402637627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65286770 + ... + 65539019.

It is an arithmetic number, because the mean of its divisors is an integer number (1288306967025).

Almost surely, 2^{16500402637625} is an apocalyptic number.

It is an amenable number.

16500402637625 is a deficient number, since it is larger than the sum of its proper divisors (4112508834775).

16500402637625 is a wasteful number, since it uses less digits than its factorization.

16500402637625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130826813 (or 130826803 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 16500402637625 in words is "sixteen trillion, five hundred billion, four hundred two million, six hundred thirty-seven thousand, six hundred twenty-five".