1812270354916 has 72 divisors (see below), whose sum is σ = 3833597617920. Its totient is φ = 746541649728.

The previous prime is 1812270354913. The next prime is 1812270354929. The reversal of 1812270354916 is 6194530722181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 1812270354916.

It is not an unprimeable number, because it can be changed into a prime (1812270354913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 552651 + ... + 1982413.

It is an arithmetic number, because the mean of its divisors is an integer number (53244411360).

It is a 1-persistent number, because it is pandigital, but 2⋅1812270354916 = 3624540709832 is not.

Almost surely, 2^{1812270354916} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812270354916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1916798808960).

1812270354916 is an abundant number, since it is smaller than the sum of its proper divisors (2021327263004).

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

1812270354916 is a wasteful number, since it uses less digits than its factorization.

1812270354916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430033 (or 1430024 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 1812270354916 in words is "one trillion, eight hundred twelve billion, two hundred seventy million, three hundred fifty-four thousand, nine hundred sixteen".