4011504561 has 24 divisors (see below), whose sum is σ = 6272235360. Its totient is φ = 2533575672.

The previous prime is 4011504559. The next prime is 4011504571. The reversal of 4011504561 is 1654051104.

4011504561 is a `hidden beast` number, since 40 + 11 + 50 + 4 + 561 = 666.

It is not a de Polignac number, because 4011504561 - 2¹ = 4011504559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (4011504571) 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 23 ways as a sum of consecutive naturals, for example, 196035 + ... + 215528.

It is an arithmetic number, because the mean of its divisors is an integer number (261343140).

Almost surely, 2^4011504561 is an apocalyptic number.

It is an amenable number.

4011504561 is a deficient number, since it is larger than the sum of its proper divisors (2260730799).

4011504561 is a wasteful number, since it uses less digits than its factorization.

4011504561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411610 (or 411585 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 4011504561 is about 63336.4394404990. The cubic root of 4011504561 is about 1588.9214579510.

Adding to 4011504561 its reverse (1654051104), we get a palindrome (5665555665).

The spelling of 4011504561 in words is "four billion, eleven million, five hundred four thousand, five hundred sixty-one".