64440101 has 8 divisors (see below), whose sum is σ = 71933664. Its totient is φ = 57219120.

The previous prime is 64440071. The next prime is 64440113. The reversal of 64440101 is 10104446.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64440101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64440601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67646 + ... + 68591.

It is an arithmetic number, because the mean of its divisors is an integer number (8991708).

Almost surely, 2^64440101 is an apocalyptic number.

It is an amenable number.

64440101 is a deficient number, since it is larger than the sum of its proper divisors (7493563).

64440101 is a wasteful number, since it uses less digits than its factorization.

64440101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136291.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64440101 is about 8027.4591870654. The cubic root of 64440101 is about 400.9147834168.

Adding to 64440101 its reverse (10104446), we get a palindrome (74544547).

The spelling of 64440101 in words is "sixty-four million, four hundred forty thousand, one hundred one".