2043873388881 has 15 divisors (see below), whose sum is σ = 3053212801771. Its totient is φ = 1362573681408.

The previous prime is 2043873388859. The next prime is 2043873388897. The reversal of 2043873388881 is 1888833783402.

The square root of 2043873388881 is 1429641.

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

2043873388881 is a `hidden beast` number, since 20 + 438 + 73 + 38 + 8 + 8 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18716702481 + 2025156686400 = 136809^2 + 1423080^2 .

It is not a de Polignac number, because 2043873388881 - 2⁵ = 2043873388849 is a prime.

It is a super-2 number, since 2×2043873388881² (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 (2043873388801) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 12787345 + ... + 12946193.

Almost surely, 2^{2043873388881} is an apocalyptic number.

2043873388881 is the 1429641-st square number.

2043873388881 is the 714821-st centered octagonal number.

It is an amenable number.

2043873388881 is a deficient number, since it is larger than the sum of its proper divisors (1009339412890).

2043873388881 is an frugal number, since it uses more digits than its factorization.

2043873388881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317710 (or 158852 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 63.

The spelling of 2043873388881 in words is "two trillion, forty-three billion, eight hundred seventy-three million, three hundred eighty-eight thousand, eight hundred eighty-one".