11718788745 has 32 divisors (see below), whose sum is σ = 19765399680. Its totient is φ = 5912524800.

The previous prime is 11718788743. The next prime is 11718788749. The reversal of 11718788745 is 54788781711.

It is a happy number.

It is not a de Polignac number, because 11718788745 - 2¹ = 11718788743 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (11718788743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170457 + ... + 229113.

It is an arithmetic number, because the mean of its divisors is an integer number (617668740).

Almost surely, 2^11718788745 is an apocalyptic number.

11718788745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11718788745 is a deficient number, since it is larger than the sum of its proper divisors (8046610935).

11718788745 is a wasteful number, since it uses less digits than its factorization.

11718788745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59385.

The product of its digits is 3512320, while the sum is 57.

The spelling of 11718788745 in words is "eleven billion, seven hundred eighteen million, seven hundred eighty-eight thousand, seven hundred forty-five".