11663120045 has 16 divisors (see below), whose sum is σ = 14823548208. Its totient is φ = 8778961920.

The previous prime is 11663120017. The next prime is 11663120089. The reversal of 11663120045 is 54002136611.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1583562436 + 10079557609 = 39794^2 + 100397^2 .

It is not a de Polignac number, because 11663120045 - 2⁸ = 11663119789 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 285227 + ... + 323543.

It is an arithmetic number, because the mean of its divisors is an integer number (926471763).

Almost surely, 2^11663120045 is an apocalyptic number.

It is an amenable number.

11663120045 is a deficient number, since it is larger than the sum of its proper divisors (3160428163).

11663120045 is a wasteful number, since it uses less digits than its factorization.

11663120045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41920.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 11663120045 its reverse (54002136611), we get a palindrome (65665256656).

The spelling of 11663120045 in words is "eleven billion, six hundred sixty-three million, one hundred twenty thousand, forty-five".