2119773681 has 27 divisors (see below), whose sum is σ = 3112801419. Its totient is φ = 1390069872.

The previous prime is 2119773661. The next prime is 2119773739. The reversal of 2119773681 is 1863779112.

The square root of 2119773681 is 46041.

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

2119773681 is a `hidden beast` number, since 211 + 9 + 77 + 368 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 248346081 + 1871427600 = 15759^2 + 43260^2 .

It is not a de Polignac number, because 2119773681 - 2⁹ = 2119773169 is a prime.

It is a super-2 number, since 2×2119773681² = 8986880917320579522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2119773641) 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 26 ways as a sum of consecutive naturals, for example, 14226595 + ... + 14226743.

Almost surely, 2^2119773681 is an apocalyptic number.

2119773681 is the 46041-st square number.

2119773681 is the 23021-st centered octagonal number.

It is an amenable number.

2119773681 is a deficient number, since it is larger than the sum of its proper divisors (993027738).

2119773681 is an equidigital number, since it uses as much as digits as its factorization.

2119773681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 255 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The cubic root of 2119773681 is about 1284.5859427913.

The spelling of 2119773681 in words is "two billion, one hundred nineteen million, seven hundred seventy-three thousand, six hundred eighty-one".