812605063909 has 8 divisors (see below), whose sum is σ = 863171944128. Its totient is φ = 762345581760.

The previous prime is 812605063877. The next prime is 812605063913. The reversal of 812605063909 is 909360506218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812605063909 - 2⁵ = 812605063877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812605063409) 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 7 ways as a sum of consecutive naturals, for example, 76844067 + ... + 76854640.

It is an arithmetic number, because the mean of its divisors is an integer number (107896493016).

Almost surely, 2^812605063909 is an apocalyptic number.

It is an amenable number.

812605063909 is a deficient number, since it is larger than the sum of its proper divisors (50566880219).

812605063909 is a wasteful number, since it uses less digits than its factorization.

812605063909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153699035.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 812605063909 in words is "eight hundred twelve billion, six hundred five million, sixty-three thousand, nine hundred nine".