1855843183312 has 80 divisors (see below), whose sum is σ = 3781473595200. Its totient is φ = 881162634240.

The previous prime is 1855843183231. The next prime is 1855843183333. The reversal of 1855843183312 is 2133813485581.

It is a self number, because there is not a number n which added to its sum of digits gives 1855843183312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6766612 + ... + 7035532.

It is an arithmetic number, because the mean of its divisors is an integer number (47268419940).

Almost surely, 2^{1855843183312} 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 1855843183312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890736797600).

1855843183312 is an abundant number, since it is smaller than the sum of its proper divisors (1925630411888).

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

1855843183312 is a wasteful number, since it uses less digits than its factorization.

1855843183312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269204 (or 269198 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 52.

The spelling of 1855843183312 in words is "one trillion, eight hundred fifty-five billion, eight hundred forty-three million, one hundred eighty-three thousand, three hundred twelve".