812722436325 has 72 divisors (see below), whose sum is σ = 1544697362208. Its totient is φ = 423371551680.

The previous prime is 812722436321. The next prime is 812722436333. The reversal of 812722436325 is 523634227218.

812722436325 is a `hidden beast` number, since 8 + 1 + 2 + 7 + 2 + 2 + 4 + 3 + 632 + 5 = 666.

It is not a de Polignac number, because 812722436325 - 2² = 812722436321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812722436321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1294374 + ... + 1816823.

Almost surely, 2^812722436325 is an apocalyptic number.

It is an amenable number.

812722436325 is a deficient number, since it is larger than the sum of its proper divisors (731974925883).

812722436325 is a wasteful number, since it uses less digits than its factorization.

812722436325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111265 (or 3111248 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 812722436325 in words is "eight hundred twelve billion, seven hundred twenty-two million, four hundred thirty-six thousand, three hundred twenty-five".