64749563 has 2 divisors, whose sum is σ = 64749564. Its totient is φ = 64749562.

The previous prime is 64749557. The next prime is 64749569. The reversal of 64749563 is 36594746.

It is a balanced prime because it is at equal distance from previous prime (64749557) and next prime (64749569).

It is a cyclic number.

It is not a de Polignac number, because 64749563 - 2⁶ = 64749499 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (64749569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32374781 + 32374782.

It is an arithmetic number, because the mean of its divisors is an integer number (32374782).

Almost surely, 2^64749563 is an apocalyptic number.

64749563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64749563 is an equidigital number, since it uses as much as digits as its factorization.

64749563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 44.

The square root of 64749563 is about 8046.7113158110. The cubic root of 64749563 is about 401.5555325382. Note that the first 4 decimals are identical.

The spelling of 64749563 in words is "sixty-four million, seven hundred forty-nine thousand, five hundred sixty-three".