4001515009 has 4 divisors (see below), whose sum is σ = 4014299716. Its totient is φ = 3988730304.

The previous prime is 4001514967. The next prime is 4001515039. The reversal of 4001515009 is 9005151004.

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 1139265009 + 2862250000 = 33753^2 + 53500^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001515009 - 2¹¹ = 4001512961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001515039) 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, 6391884 + ... + 6392509.

It is an arithmetic number, because the mean of its divisors is an integer number (1003574929).

Almost surely, 2^4001515009 is an apocalyptic number.

It is an amenable number.

4001515009 is a deficient number, since it is larger than the sum of its proper divisors (12784707).

4001515009 is a wasteful number, since it uses less digits than its factorization.

4001515009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784706.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 4001515009 is about 63257.5292672738. The cubic root of 4001515009 is about 1587.6014372449.

The spelling of 4001515009 in words is "four billion, one million, five hundred fifteen thousand, nine".