812544500 has 48 divisors (see below), whose sum is σ = 1868018880. Its totient is φ = 307908000.

The previous prime is 812544463. The next prime is 812544511. The reversal of 812544500 is 5445218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33266 + ... + 52265.

It is an arithmetic number, because the mean of its divisors is an integer number (38917060).

Almost surely, 2^812544500 is an apocalyptic number.

It is an amenable number.

812544500 is an abundant number, since it is smaller than the sum of its proper divisors (1055474380).

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

812544500 is a wasteful number, since it uses less digits than its factorization.

812544500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85569 (or 85557 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 812544500 is about 28505.1661984280. The cubic root of 812544500 is about 933.1448244571.

Adding to 812544500 its reverse (5445218), we get a palindrome (817989718).

It can be divided in two parts, 8125 and 44500, that added together give a palindrome (52625).

The spelling of 812544500 in words is "eight hundred twelve million, five hundred forty-four thousand, five hundred".