64509061 has 2 divisors, whose sum is σ = 64509062. Its totient is φ = 64509060.

The previous prime is 64509059. The next prime is 64509077. The reversal of 64509061 is 16090546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64496961 + 12100 = 8031^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 64509061 - 2¹ = 64509059 is a prime.

It is a super-2 number, since 2×64509061² = 8322837902203442, which contains 22 as substring.

Together with 64509059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64509041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32254530 + 32254531.

It is an arithmetic number, because the mean of its divisors is an integer number (32254531).

Almost surely, 2^64509061 is an apocalyptic number.

It is an amenable number.

64509061 is a deficient number, since it is larger than the sum of its proper divisors (1).

64509061 is an equidigital number, since it uses as much as digits as its factorization.

64509061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 64509061 is about 8031.7532955140. The cubic root of 64509061 is about 401.0577442274.

The spelling of 64509061 in words is "sixty-four million, five hundred nine thousand, sixty-one".