812804545656 has 48 divisors (see below), whose sum is σ = 2297056329360. Its totient is φ = 259155072000.

The previous prime is 812804545621. The next prime is 812804545699. The reversal of 812804545656 is 656545408218.

812804545656 is a `hidden beast` number, since 8 + 1 + 28 + 0 + 4 + 54 + 565 + 6 = 666.

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, 245410345 + ... + 245413656.

It is an arithmetic number, because the mean of its divisors is an integer number (47855340195).

Almost surely, 2^812804545656 is an apocalyptic number.

It is an amenable number.

812804545656 is an abundant number, since it is smaller than the sum of its proper divisors (1484251783704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812804545656 is a wasteful number, since it uses less digits than its factorization.

812804545656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490824036 (or 490824029 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 54.

The spelling of 812804545656 in words is "eight hundred twelve billion, eight hundred four million, five hundred forty-five thousand, six hundred fifty-six".