1854991223712 has 384 divisors, whose sum is σ = 6138597104640. Its totient is φ = 540038016000.

The previous prime is 1854991223699. The next prime is 1854991223717. The reversal of 1854991223712 is 2173221994581.

1854991223712 is a `hidden beast` number, since 1 + 8 + 549 + 9 + 1 + 2 + 23 + 71 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1854991223717) 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 63 ways as a sum of consecutive naturals, for example, 24891787 + ... + 24966197.

It is an arithmetic number, because the mean of its divisors is an integer number (15985929960).

Almost surely, 2^{1854991223712} is an apocalyptic number.

1854991223712 is a gapful number since it is divisible by the number (12) 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 1854991223712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3069298552320).

1854991223712 is an abundant number, since it is smaller than the sum of its proper divisors (4283605880928).

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

1854991223712 is a wasteful number, since it uses less digits than its factorization.

1854991223712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74545 (or 74531 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 1854991223712 in words is "one trillion, eight hundred fifty-four billion, nine hundred ninety-one million, two hundred twenty-three thousand, seven hundred twelve".