11513505673 has 8 divisors (see below), whose sum is σ = 12232430280. Its totient is φ = 10816041600.

The previous prime is 11513505659. The next prime is 11513505691. The reversal of 11513505673 is 37650531511.

It can be written as a sum of positive squares in 4 ways, for example, as 872139024 + 10641366649 = 29532^2 + 103157^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11513505673 - 2⁹ = 11513505161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11513505173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5364028 + ... + 5366173.

It is an arithmetic number, because the mean of its divisors is an integer number (1529053785).

Almost surely, 2^11513505673 is an apocalyptic number.

It is an amenable number.

11513505673 is a deficient number, since it is larger than the sum of its proper divisors (718924607).

11513505673 is a wasteful number, since it uses less digits than its factorization.

11513505673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10730267.

The product of its (nonzero) digits is 47250, while the sum is 37.

The spelling of 11513505673 in words is "eleven billion, five hundred thirteen million, five hundred five thousand, six hundred seventy-three".