64764563 has 2 divisors, whose sum is σ = 64764564. Its totient is φ = 64764562.

The previous prime is 64764529. The next prime is 64764587. The reversal of 64764563 is 36546746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64764563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64764563.

It is not a weakly prime, because it can be changed into another prime (64764523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32382281 + 32382282.

It is an arithmetic number, because the mean of its divisors is an integer number (32382282).

Almost surely, 2^64764563 is an apocalyptic number.

64764563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64764563 is an equidigital number, since it uses as much as digits as its factorization.

64764563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 41.

The square root of 64764563 is about 8047.6433196309. The cubic root of 64764563 is about 401.5865385025.

The spelling of 64764563 in words is "sixty-four million, seven hundred sixty-four thousand, five hundred sixty-three".