816250725 has 72 divisors (see below), whose sum is σ = 1506510720. Its totient is φ = 422231040.

The previous prime is 816250667. The next prime is 816250769. The reversal of 816250725 is 527052618.

It is a happy number.

816250725 is a `hidden beast` number, since 8 + 1 + 625 + 0 + 7 + 25 = 666.

It is not a de Polignac number, because 816250725 - 2⁶ = 816250661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 816250725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2312149 + ... + 2312501.

It is an arithmetic number, because the mean of its divisors is an integer number (20923760).

Almost surely, 2^816250725 is an apocalyptic number.

It is an amenable number.

816250725 is a deficient number, since it is larger than the sum of its proper divisors (690259995).

816250725 is a wasteful number, since it uses less digits than its factorization.

816250725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 816250725 is about 28570.1019424153. The cubic root of 816250725 is about 934.5614441726.

The spelling of 816250725 in words is "eight hundred sixteen million, two hundred fifty thousand, seven hundred twenty-five".