812125648 has 20 divisors (see below), whose sum is σ = 1589075748. Its totient is φ = 402041600.

The previous prime is 812125627. The next prime is 812125661. The reversal of 812125648 is 846521218.

It can be written as a sum of positive squares in 2 ways, for example, as 788037184 + 24088464 = 28072^2 + 4908^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249661 + ... + 252892.

Almost surely, 2^812125648 is an apocalyptic number.

It is an amenable number.

812125648 is a deficient number, since it is larger than the sum of its proper divisors (776950100).

812125648 is a wasteful number, since it uses less digits than its factorization.

812125648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502662 (or 502656 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 812125648 is about 28497.8183024596. The cubic root of 812125648 is about 932.9844571361.

The spelling of 812125648 in words is "eight hundred twelve million, one hundred twenty-five thousand, six hundred forty-eight".