64628563 has 2 divisors, whose sum is σ = 64628564. Its totient is φ = 64628562.

The previous prime is 64628549. The next prime is 64628581. The reversal of 64628563 is 36582646.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64628563 is a prime.

It is not a weakly prime, because it can be changed into another prime (64628363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32314281 + 32314282.

It is an arithmetic number, because the mean of its divisors is an integer number (32314282).

Almost surely, 2^64628563 is an apocalyptic number.

64628563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64628563 is an equidigital number, since it uses as much as digits as its factorization.

64628563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The square root of 64628563 is about 8039.1892004107. The cubic root of 64628563 is about 401.3052424725.

The spelling of 64628563 in words is "sixty-four million, six hundred twenty-eight thousand, five hundred sixty-three".