1820843675616 has 192 divisors, whose sum is σ = 5752206835200. Its totient is φ = 492673591296.

The previous prime is 1820843675587. The next prime is 1820843675627. The reversal of 1820843675616 is 6165763480281.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35584386 + ... + 35635518.

It is an arithmetic number, because the mean of its divisors is an integer number (29959410600).

Almost surely, 2^{1820843675616} is an apocalyptic number.

1820843675616 is a gapful number since it is divisible by the number (16) 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 1820843675616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2876103417600).

1820843675616 is an abundant number, since it is smaller than the sum of its proper divisors (3931363159584).

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

1820843675616 is a wasteful number, since it uses less digits than its factorization.

1820843675616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53961 (or 53953 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 1820843675616 in words is "one trillion, eight hundred twenty billion, eight hundred forty-three million, six hundred seventy-five thousand, six hundred sixteen".