64494761 has 2 divisors, whose sum is σ = 64494762. Its totient is φ = 64494760.

The previous prime is 64494757. The next prime is 64494817. The reversal of 64494761 is 16749446.

64494761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 414736 = 8005^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 64494761 - 2² = 64494757 is a prime.

It is not a weakly prime, because it can be changed into another prime (64494061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32247380 + 32247381.

It is an arithmetic number, because the mean of its divisors is an integer number (32247381).

Almost surely, 2^64494761 is an apocalyptic number.

It is an amenable number.

64494761 is a deficient number, since it is larger than the sum of its proper divisors (1).

64494761 is an equidigital number, since it uses as much as digits as its factorization.

64494761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 64494761 is about 8030.8630295878. The cubic root of 64494761 is about 401.0281073078.

The spelling of 64494761 in words is "sixty-four million, four hundred ninety-four thousand, seven hundred sixty-one".