64511563 has 2 divisors, whose sum is σ = 64511564. Its totient is φ = 64511562.

The previous prime is 64511543. The next prime is 64511581. The reversal of 64511563 is 36511546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64511563 - 2¹³ = 64503371 is a prime.

It is not a weakly prime, because it can be changed into another prime (64511543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32255781 + 32255782.

It is an arithmetic number, because the mean of its divisors is an integer number (32255782).

Almost surely, 2^64511563 is an apocalyptic number.

64511563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64511563 is an equidigital number, since it uses as much as digits as its factorization.

64511563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 64511563 is about 8031.9090507799. The cubic root of 64511563 is about 401.0629292019.

The spelling of 64511563 in words is "sixty-four million, five hundred eleven thousand, five hundred sixty-three".