5896121681 has 4 divisors (see below), whose sum is σ = 5896321332. Its totient is φ = 5895922032.

The previous prime is 5896121669. The next prime is 5896121711. The reversal of 5896121681 is 1861216985.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1861216985 = 5 ⋅372243397.

It can be written as a sum of positive squares in 2 ways, for example, as 1941724225 + 3954397456 = 44065^2 + 62884^2 .

It is a cyclic number.

It is not a de Polignac number, because 5896121681 - 2⁶ = 5896121617 is a prime.

It is a super-2 number, since 2×5896121681² = 69528501754316531522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5896121081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45770 + ... + 117843.

It is an arithmetic number, because the mean of its divisors is an integer number (1474080333).

Almost surely, 2^5896121681 is an apocalyptic number.

It is an amenable number.

5896121681 is a deficient number, since it is larger than the sum of its proper divisors (199651).

5896121681 is a wasteful number, since it uses less digits than its factorization.

5896121681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199650.

The product of its digits is 207360, while the sum is 47.

The square root of 5896121681 is about 76786.2076222026. The cubic root of 5896121681 is about 1806.5728502358.

The spelling of 5896121681 in words is "five billion, eight hundred ninety-six million, one hundred twenty-one thousand, six hundred eighty-one".