2119681601 has 8 divisors (see below), whose sum is σ = 2321761320. Its totient is φ = 1926201088.

The previous prime is 2119681579. The next prime is 2119681607. The reversal of 2119681601 is 1061869112.

It is a Cunningham number, because it is equal to 46040²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 209554576 + 1910127025 = 14476^2 + 43705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2119681601 - 2⁶ = 2119681537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2119681607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2149286 + ... + 2150271.

It is an arithmetic number, because the mean of its divisors is an integer number (290220165).

Almost surely, 2^2119681601 is an apocalyptic number.

It is an amenable number.

2119681601 is a deficient number, since it is larger than the sum of its proper divisors (202079719).

2119681601 is a wasteful number, since it uses less digits than its factorization.

2119681601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299603.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 2119681601 is about 46040.0000108601. Note that the first 4 decimals coincide. The cubic root of 2119681601 is about 1284.5673423172.

The spelling of 2119681601 in words is "two billion, one hundred nineteen million, six hundred eighty-one thousand, six hundred one".