16386625 has 16 divisors (see below), whose sum is σ = 20563920. Its totient is φ = 13036800.

The previous prime is 16386619. The next prime is 16386637. The reversal of 16386625 is 52668361.

It can be written as a sum of positive squares in 8 ways, for example, as 9480241 + 6906384 = 3079^2 + 2628^2 .

It is not a de Polignac number, because 16386625 - 2⁷ = 16386497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41931 + ... + 42319.

It is an arithmetic number, because the mean of its divisors is an integer number (1285245).

Almost surely, 2^16386625 is an apocalyptic number.

It is an amenable number.

16386625 is a deficient number, since it is larger than the sum of its proper divisors (4177295).

16386625 is an equidigital number, since it uses as much as digits as its factorization.

16386625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 731 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 16386625 is about 4048.0396490153. The cubic root of 16386625 is about 253.9977318085.

The spelling of 16386625 in words is "sixteen million, three hundred eighty-six thousand, six hundred twenty-five".