1812796854820 has 144 divisors (see below), whose sum is σ = 4679628024960. Its totient is φ = 586525556736.

The previous prime is 1812796854797. The next prime is 1812796854823. The reversal of 1812796854820 is 284586972181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1812796854823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4595929 + ... + 4974751.

It is an arithmetic number, because the mean of its divisors is an integer number (32497416840).

Almost surely, 2^{1812796854820} is an apocalyptic number.

1812796854820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812796854820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339814012480).

1812796854820 is an abundant number, since it is smaller than the sum of its proper divisors (2866831170140).

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

1812796854820 is a wasteful number, since it uses less digits than its factorization.

1812796854820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379122 (or 379113 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 61.

The spelling of 1812796854820 in words is "one trillion, eight hundred twelve billion, seven hundred ninety-six million, eight hundred fifty-four thousand, eight hundred twenty".