812467856745 has 48 divisors (see below), whose sum is σ = 1413871102800. Its totient is φ = 431595947520.

The previous prime is 812467856743. The next prime is 812467856779. The reversal of 812467856745 is 547658764218.

812467856745 is a `hidden beast` number, since 8 + 1 + 2 + 4 + 67 + 8 + 567 + 4 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 298692854784 + 513775001961 = 546528^2 + 716781^2 .

It is not a de Polignac number, because 812467856745 - 2¹ = 812467856743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812467856743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75299811 + ... + 75310599.

It is an arithmetic number, because the mean of its divisors is an integer number (29455647975).

Almost surely, 2^812467856745 is an apocalyptic number.

It is an amenable number.

812467856745 is a deficient number, since it is larger than the sum of its proper divisors (601403246055).

812467856745 is a wasteful number, since it uses less digits than its factorization.

812467856745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17290 (or 17287 counting only the distinct ones).

The product of its digits is 90316800, while the sum is 63.

The spelling of 812467856745 in words is "eight hundred twelve billion, four hundred sixty-seven million, eight hundred fifty-six thousand, seven hundred forty-five".