611080804921 has 2 divisors, whose sum is σ = 611080804922. Its totient is φ = 611080804920.

The previous prime is 611080804903. The next prime is 611080804933. The reversal of 611080804921 is 129408080116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600215869696 + 10864935225 = 774736^2 + 104235^2 .

It is a cyclic number.

It is not a de Polignac number, because 611080804921 - 2¹⁷ = 611080673849 is a prime.

It is not a weakly prime, because it can be changed into another prime (611080804721) 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 as a sum of consecutive naturals, namely, 305540402460 + 305540402461.

It is an arithmetic number, because the mean of its divisors is an integer number (305540402461).

Almost surely, 2^611080804921 is an apocalyptic number.

It is an amenable number.

611080804921 is a deficient number, since it is larger than the sum of its proper divisors (1).

611080804921 is an equidigital number, since it uses as much as digits as its factorization.

611080804921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 611080804921 in words is "six hundred eleven billion, eighty million, eight hundred four thousand, nine hundred twenty-one".