64740563 has 2 divisors, whose sum is σ = 64740564. Its totient is φ = 64740562.

The previous prime is 64740527. The next prime is 64740587. The reversal of 64740563 is 36504746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64740563 is a prime.

It is not a weakly prime, because it can be changed into another prime (64749563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32370281 + 32370282.

It is an arithmetic number, because the mean of its divisors is an integer number (32370282).

Almost surely, 2^64740563 is an apocalyptic number.

64740563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64740563 is an equidigital number, since it uses as much as digits as its factorization.

64740563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 64740563 is about 8046.1520617001. The cubic root of 64740563 is about 401.5369266610.

The spelling of 64740563 in words is "sixty-four million, seven hundred forty thousand, five hundred sixty-three".