64503563 has 2 divisors, whose sum is σ = 64503564. Its totient is φ = 64503562.

The previous prime is 64503539. The next prime is 64503589. The reversal of 64503563 is 36530546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64503563 - 2¹² = 64499467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (64503503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32251781 + 32251782.

It is an arithmetic number, because the mean of its divisors is an integer number (32251782).

Almost surely, 2^64503563 is an apocalyptic number.

64503563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64503563 is an equidigital number, since it uses as much as digits as its factorization.

64503563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 64503563 is about 8031.4110217321. The cubic root of 64503563 is about 401.0463500755.

The spelling of 64503563 in words is "sixty-four million, five hundred three thousand, five hundred sixty-three".