64501109 has 2 divisors, whose sum is σ = 64501110. Its totient is φ = 64501108.

The previous prime is 64501097. The next prime is 64501127. The reversal of 64501109 is 90110546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58140625 + 6360484 = 7625^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 64501109 - 2⁴ = 64501093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64501139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32250554 + 32250555.

It is an arithmetic number, because the mean of its divisors is an integer number (32250555).

Almost surely, 2^64501109 is an apocalyptic number.

It is an amenable number.

64501109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64501109 is an equidigital number, since it uses as much as digits as its factorization.

64501109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 64501109 is about 8031.2582451320. The cubic root of 64501109 is about 401.0412641537.

The spelling of 64501109 in words is "sixty-four million, five hundred one thousand, one hundred nine".