812105488372 has 24 divisors (see below), whose sum is σ = 1429832355840. Its totient is φ = 403582427040.

The previous prime is 812105488367. The next prime is 812105488373. The reversal of 812105488372 is 273884501218.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812105488373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7641922 + ... + 7747462.

It is an arithmetic number, because the mean of its divisors is an integer number (59576348160).

Almost surely, 2^812105488372 is an apocalyptic number.

It is an amenable number.

812105488372 is a deficient number, since it is larger than the sum of its proper divisors (617726867468).

812105488372 is a wasteful number, since it uses less digits than its factorization.

812105488372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117231 (or 117229 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 812105488372 in words is "eight hundred twelve billion, one hundred five million, four hundred eighty-eight thousand, three hundred seventy-two".