4001565013 has 4 divisors (see below), whose sum is σ = 4007024908. Its totient is φ = 3996105120.

The previous prime is 4001565011. The next prime is 4001565019. The reversal of 4001565013 is 3105651004.

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 3920888689 + 80676324 = 62617^2 + 8982^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001565013 - 2¹ = 4001565011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001565011) 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, 2728848 + ... + 2730313.

It is an arithmetic number, because the mean of its divisors is an integer number (1001756227).

Almost surely, 2^4001565013 is an apocalyptic number.

It is an amenable number.

4001565013 is a deficient number, since it is larger than the sum of its proper divisors (5459895).

4001565013 is an equidigital number, since it uses as much as digits as its factorization.

4001565013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459894.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 4001565013 is about 63257.9245075271. The cubic root of 4001565013 is about 1587.6080502478.

The spelling of 4001565013 in words is "four billion, one million, five hundred sixty-five thousand, thirteen".