11400017658721 has 4 divisors (see below), whose sum is σ = 11476527844500. Its totient is φ = 11323507472944.

The previous prime is 11400017658707. The next prime is 11400017658769. The reversal of 11400017658721 is 12785671000411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1208759518096 + 10191258140625 = 1099436^2 + 3192375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11400017658721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11400012658721) 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 3 ways as a sum of consecutive naturals, for example, 38255092666 + ... + 38255092963.

It is an arithmetic number, because the mean of its divisors is an integer number (2869131961125).

Almost surely, 2^{11400017658721} is an apocalyptic number.

It is an amenable number.

11400017658721 is a deficient number, since it is larger than the sum of its proper divisors (76510185779).

11400017658721 is an equidigital number, since it uses as much as digits as its factorization.

11400017658721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76510185778.

The product of its (nonzero) digits is 94080, while the sum is 43.

The spelling of 11400017658721 in words is "eleven trillion, four hundred billion, seventeen million, six hundred fifty-eight thousand, seven hundred twenty-one".