4001500565 has 8 divisors (see below), whose sum is σ = 4802167608. Its totient is φ = 3200955840.

The previous prime is 4001500541. The next prime is 4001500589. The reversal of 4001500565 is 5650051004.

It is an interprime number because it is at equal distance from previous prime (4001500541) and next prime (4001500589).

It can be written as a sum of positive squares in 4 ways, for example, as 8145316 + 3993355249 = 2854^2 + 63193^2 .

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

It is not a de Polignac number, because 4001500565 - 2¹⁶ = 4001435029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73775 + ... + 115955.

It is an arithmetic number, because the mean of its divisors is an integer number (600270951).

Almost surely, 2^4001500565 is an apocalyptic number.

It is an amenable number.

4001500565 is a deficient number, since it is larger than the sum of its proper divisors (800667043).

4001500565 is a wasteful number, since it uses less digits than its factorization.

4001500565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61159.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 4001500565 is about 63257.4150989431. The cubic root of 4001500565 is about 1587.5995270232.

Adding to 4001500565 its reverse (5650051004), we get a palindrome (9651551569).

The spelling of 4001500565 in words is "four billion, one million, five hundred thousand, five hundred sixty-five".