816447925 has 12 divisors (see below), whose sum is σ = 1015981600. Its totient is φ = 650844720.

The previous prime is 816447893. The next prime is 816447941. The reversal of 816447925 is 529744618.

It is not a de Polignac number, because 816447925 - 2⁵ = 816447893 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50625 + ... + 64774.

Almost surely, 2^816447925 is an apocalyptic number.

It is an amenable number.

816447925 is a deficient number, since it is larger than the sum of its proper divisors (199533675).

816447925 is a wasteful number, since it uses less digits than its factorization.

816447925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115692 (or 115687 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 816447925 is about 28573.5528942412. The cubic root of 816447925 is about 934.6366991041.

The spelling of 816447925 in words is "eight hundred sixteen million, four hundred forty-seven thousand, nine hundred twenty-five".