812743785524 has 48 divisors (see below), whose sum is σ = 1681078867776. Its totient is φ = 339611865600.

The previous prime is 812743785463. The next prime is 812743785527. The reversal of 812743785524 is 425587347218.

It is a happy number.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 812743785524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812743785527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12602207 + ... + 12666534.

It is an arithmetic number, because the mean of its divisors is an integer number (35022476412).

Almost surely, 2^812743785524 is an apocalyptic number.

It is an amenable number.

812743785524 is an abundant number, since it is smaller than the sum of its proper divisors (868335082252).

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

812743785524 is a wasteful number, since it uses less digits than its factorization.

812743785524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25268816 (or 25268814 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 56.

The spelling of 812743785524 in words is "eight hundred twelve billion, seven hundred forty-three million, seven hundred eighty-five thousand, five hundred twenty-four".