64440023041 has 8 divisors (see below), whose sum is σ = 66183765120. Its totient is φ = 62707423632.

The previous prime is 64440023033. The next prime is 64440023071. The reversal of 64440023041 is 14032004446.

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

It is a cyclic number.

It is not a de Polignac number, because 64440023041 - 2³ = 64440023033 is a prime.

It is a super-2 number, since 2×64440023041² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64440023071) 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, 2773945 + ... + 2797078.

It is an arithmetic number, because the mean of its divisors is an integer number (8272970640).

Almost surely, 2^64440023041 is an apocalyptic number.

It is an amenable number.

64440023041 is a deficient number, since it is larger than the sum of its proper divisors (1743742079).

64440023041 is a wasteful number, since it uses less digits than its factorization.

64440023041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571335.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 64440023041 its reverse (14032004446), we get a palindrome (78472027487).

The spelling of 64440023041 in words is "sixty-four billion, four hundred forty million, twenty-three thousand, forty-one".