5641117921 has 2 divisors, whose sum is σ = 5641117922. Its totient is φ = 5641117920.

The previous prime is 5641117919. The next prime is 5641117943. The reversal of 5641117921 is 1297111465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5294599696 + 346518225 = 72764^2 + 18615^2 .

It is a cyclic number.

It is not a de Polignac number, because 5641117921 - 2¹ = 5641117919 is a prime.

It is a super-2 number, since 2×5641117921² = 63644422797254724482, which contains 22 as substring.

Together with 5641117919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5641117901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820558960 + 2820558961.

It is an arithmetic number, because the mean of its divisors is an integer number (2820558961).

Almost surely, 2^5641117921 is an apocalyptic number.

It is an amenable number.

5641117921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5641117921 is an equidigital number, since it uses as much as digits as its factorization.

5641117921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 37.

The square root of 5641117921 is about 75107.3759427128. The cubic root of 5641117921 is about 1780.1436908999.

The spelling of 5641117921 in words is "five billion, six hundred forty-one million, one hundred seventeen thousand, nine hundred twenty-one".