1854932317681 has 3 divisors (see below), whose sum is σ = 1854933679641. Its totient is φ = 1854930955722.

The previous prime is 1854932317673. The next prime is 1854932317717. The reversal of 1854932317681 is 1867132394581.

The square root of 1854932317681 is 1361959.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1854932317681 - 2³ = 1854932317673 is a prime.

It is a super-2 number, since 2×1854932317681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1854932317621) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 680980 + ... + 2042938.

It is an arithmetic number, because the mean of its divisors is an integer number (618311226547).

Almost surely, 2^{1854932317681} is an apocalyptic number.

1854932317681 is the 1361959-th square number.

1854932317681 is the 680980-th centered octagonal number.

It is an amenable number.

1854932317681 is a deficient number, since it is larger than the sum of its proper divisors (1361960).

1854932317681 is an frugal number, since it uses more digits than its factorization.

1854932317681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723918 (or 1361959 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The spelling of 1854932317681 in words is "one trillion, eight hundred fifty-four billion, nine hundred thirty-two million, three hundred seventeen thousand, six hundred eighty-one".