4000909501 has 16 divisors (see below), whose sum is σ = 4278928896. Its totient is φ = 3731854896.

The previous prime is 4000909499. The next prime is 4000909511. The reversal of 4000909501 is 1059090004.

It is a cyclic number.

It is not a de Polignac number, because 4000909501 - 2¹ = 4000909499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4000909501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000909511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672526 + ... + 678448.

It is an arithmetic number, because the mean of its divisors is an integer number (267433056).

Almost surely, 2^4000909501 is an apocalyptic number.

It is an amenable number.

4000909501 is a deficient number, since it is larger than the sum of its proper divisors (278019395).

4000909501 is a wasteful number, since it uses less digits than its factorization.

4000909501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 4000909501 is about 63252.7430314291. The cubic root of 4000909501 is about 1587.5213547544.

Adding to 4000909501 its reverse (1059090004), we get a palindrome (5059999505).

The spelling of 4000909501 in words is "four billion, nine hundred nine thousand, five hundred one".