64509461 has 2 divisors, whose sum is σ = 64509462. Its totient is φ = 64509460.

The previous prime is 64509449. The next prime is 64509491. The reversal of 64509461 is 16490546.

64509461 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., 64480900 + 28561 = 8030^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 64509461 - 2⁶ = 64509397 is a prime.

It is a super-2 number, since 2×64509461² = 8322941117021042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64509491) 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, 32254730 + 32254731.

It is an arithmetic number, because the mean of its divisors is an integer number (32254731).

Almost surely, 2^64509461 is an apocalyptic number.

It is an amenable number.

64509461 is a deficient number, since it is larger than the sum of its proper divisors (1).

64509461 is an equidigital number, since it uses as much as digits as its factorization.

64509461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 64509461 is about 8031.7781966386. The cubic root of 64509461 is about 401.0585731692.

The spelling of 64509461 in words is "sixty-four million, five hundred nine thousand, four hundred sixty-one".