64651841 has 2 divisors, whose sum is σ = 64651842. Its totient is φ = 64651840.

The previous prime is 64651823. The next prime is 64651871. The reversal of 64651841 is 14815646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35058241 + 29593600 = 5921^2 + 5440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64651841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64651801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32325920 + 32325921.

It is an arithmetic number, because the mean of its divisors is an integer number (32325921).

Almost surely, 2^64651841 is an apocalyptic number.

It is an amenable number.

64651841 is a deficient number, since it is larger than the sum of its proper divisors (1).

64651841 is an equidigital number, since it uses as much as digits as its factorization.

64651841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 64651841 is about 8040.6368528867. The cubic root of 64651841 is about 401.3534175707.

The spelling of 64651841 in words is "sixty-four million, six hundred fifty-one thousand, eight hundred forty-one".