64461559 has 2 divisors, whose sum is σ = 64461560. Its totient is φ = 64461558.

The previous prime is 64461557. The next prime is 64461587. The reversal of 64461559 is 95516446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64461559 - 2¹ = 64461557 is a prime.

Together with 64461557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64461557) 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 as a sum of consecutive naturals, namely, 32230779 + 32230780.

It is an arithmetic number, because the mean of its divisors is an integer number (32230780).

Almost surely, 2^64461559 is an apocalyptic number.

64461559 is a deficient number, since it is larger than the sum of its proper divisors (1).

64461559 is an equidigital number, since it uses as much as digits as its factorization.

64461559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 64461559 is about 8028.7956132909. The cubic root of 64461559 is about 400.9592788711.

The spelling of 64461559 in words is "sixty-four million, four hundred sixty-one thousand, five hundred fifty-nine".