1854422979984 has 195 divisors, whose sum is σ = 5400978616987. Its totient is φ = 616817350944.

The previous prime is 1854422979923. The next prime is 1854422979989. The reversal of 1854422979984 is 4899792244581.

The square root of 1854422979984 is 1361772.

It is a perfect power (a square), and thus also a powerful number.

1854422979984 is a `hidden beast` number, since 1 + 8 + 5 + 442 + 2 + 97 + 9 + 98 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1854422979989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 38 ways as a sum of consecutive naturals, for example, 3970926919 + ... + 3970927385.

Almost surely, 2^{1854422979984} is an apocalyptic number.

1854422979984 is the 1361772-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1854422979984

1854422979984 is an abundant number, since it is smaller than the sum of its proper divisors (3546555637003).

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

1854422979984 is an frugal number, since it uses more digits than its factorization.

1854422979984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 472 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 72.

The spelling of 1854422979984 in words is "one trillion, eight hundred fifty-four billion, four hundred twenty-two million, nine hundred seventy-nine thousand, nine hundred eighty-four".