1604660611 has 2 divisors, whose sum is σ = 1604660612. Its totient is φ = 1604660610.

The previous prime is 1604660593. The next prime is 1604660623. The reversal of 1604660611 is 1160664061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1604660611 - 2⁷ = 1604660483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1604660411) 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, 802330305 + 802330306.

It is an arithmetic number, because the mean of its divisors is an integer number (802330306).

Almost surely, 2^1604660611 is an apocalyptic number.

1604660611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604660611 is an equidigital number, since it uses as much as digits as its factorization.

1604660611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1604660611 is about 40058.2152747723. The cubic root of 1604660611 is about 1170.7416368382.

The spelling of 1604660611 in words is "one billion, six hundred four million, six hundred sixty thousand, six hundred eleven".