5611890121 has 4 divisors (see below), whose sum is σ = 5617779732. Its totient is φ = 5606000512.

The previous prime is 5611890073. The next prime is 5611890127. The reversal of 5611890121 is 1210981165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1665537721 + 3946352400 = 40811^2 + 62820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5611890121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5611890127) 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 3 ways as a sum of consecutive naturals, for example, 2943376 + ... + 2945281.

It is an arithmetic number, because the mean of its divisors is an integer number (1404444933).

Almost surely, 2^5611890121 is an apocalyptic number.

It is an amenable number.

5611890121 is a deficient number, since it is larger than the sum of its proper divisors (5889611).

5611890121 is an equidigital number, since it uses as much as digits as its factorization.

5611890121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889610.

The product of its (nonzero) digits is 4320, while the sum is 34.

The square root of 5611890121 is about 74912.5498231104. The cubic root of 5611890121 is about 1777.0639347886.

The spelling of 5611890121 in words is "five billion, six hundred eleven million, eight hundred ninety thousand, one hundred twenty-one".