4011243561 has 36 divisors (see below), whose sum is σ = 6380478000. Its totient is φ = 2426565024.

The previous prime is 4011243557. The next prime is 4011243571. The reversal of 4011243561 is 1653421104.

It is a happy number.

It is not a de Polignac number, because 4011243561 - 2² = 4011243557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4011243541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 67390 + ... + 112088.

It is an arithmetic number, because the mean of its divisors is an integer number (177235500).

Almost surely, 2^4011243561 is an apocalyptic number.

It is an amenable number.

4011243561 is a deficient number, since it is larger than the sum of its proper divisors (2369234439).

4011243561 is a wasteful number, since it uses less digits than its factorization.

4011243561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44790 (or 44774 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 4011243561 is about 63334.3789817189. The cubic root of 4011243561 is about 1588.8869972735.

Adding to 4011243561 its reverse (1653421104), we get a palindrome (5664664665).

The spelling of 4011243561 in words is "four billion, eleven million, two hundred forty-three thousand, five hundred sixty-one".