4001015505 has 16 divisors (see below), whose sum is σ = 6402493440. Its totient is φ = 2133585408.

The previous prime is 4001015503. The next prime is 4001015509. The reversal of 4001015505 is 5055101004.

It is not a de Polignac number, because 4001015505 - 2¹ = 4001015503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4001015503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141601 + ... + 167489.

It is an arithmetic number, because the mean of its divisors is an integer number (400155840).

Almost surely, 2^4001015505 is an apocalyptic number.

It is an amenable number.

4001015505 is a deficient number, since it is larger than the sum of its proper divisors (2401477935).

4001015505 is a wasteful number, since it uses less digits than its factorization.

4001015505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36200.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 4001015505 is about 63253.5809658236. The cubic root of 4001015505 is about 1587.5353750771.

Adding to 4001015505 its reverse (5055101004), we get a palindrome (9056116509).

The spelling of 4001015505 in words is "four billion, one million, fifteen thousand, five hundred five".