64641611 has 2 divisors, whose sum is σ = 64641612. Its totient is φ = 64641610.

The previous prime is 64641607. The next prime is 64641617. The reversal of 64641611 is 11614646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64641611 - 2² = 64641607 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (64641617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32320805 + 32320806.

It is an arithmetic number, because the mean of its divisors is an integer number (32320806).

Almost surely, 2^64641611 is an apocalyptic number.

64641611 is a deficient number, since it is larger than the sum of its proper divisors (1).

64641611 is an equidigital number, since it uses as much as digits as its factorization.

64641611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 64641611 is about 8040.0006840796. Note that the first 3 decimals coincide. The cubic root of 64641611 is about 401.3322474490.

The spelling of 64641611 in words is "sixty-four million, six hundred forty-one thousand, six hundred eleven".