4001440651 has 8 divisors (see below), whose sum is σ = 4309854080. Its totient is φ = 3693114432.

The previous prime is 4001440567. The next prime is 4001440673. The reversal of 4001440651 is 1560441004.

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 4001440651 - 2¹¹ = 4001438603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001443651) 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, 97855 + ... + 132583.

It is an arithmetic number, because the mean of its divisors is an integer number (538731760).

Almost surely, 2^4001440651 is an apocalyptic number.

4001440651 is a deficient number, since it is larger than the sum of its proper divisors (308413429).

4001440651 is a wasteful number, since it uses less digits than its factorization.

4001440651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43605.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4001440651 is about 63256.9415242312. The cubic root of 4001440651 is about 1587.5916033363.

Adding to 4001440651 its reverse (1560441004), we get a palindrome (5561881655).

The spelling of 4001440651 in words is "four billion, one million, four hundred forty thousand, six hundred fifty-one".