64650001 has 4 divisors (see below), whose sum is σ = 69623092. Its totient is φ = 59676912.

The previous prime is 64649969. The next prime is 64650011. The reversal of 64650001 is 10005646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32216976 + 32433025 = 5676^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 64650001 - 2⁵ = 64649969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64650011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2486526 + ... + 2486551.

It is an arithmetic number, because the mean of its divisors is an integer number (17405773).

Almost surely, 2^64650001 is an apocalyptic number.

It is an amenable number.

64650001 is a deficient number, since it is larger than the sum of its proper divisors (4973091).

64650001 is a wasteful number, since it uses less digits than its factorization.

64650001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4973090.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 64650001 is about 8040.5224332751. The cubic root of 64650001 is about 401.3496100107.

Adding to 64650001 its reverse (10005646), we get a palindrome (74655647).

The spelling of 64650001 in words is "sixty-four million, six hundred fifty thousand, one".