11331816555261 has 8 divisors (see below), whose sum is σ = 15630091800480. Its totient is φ = 7294042840112.

The previous prime is 11331816555247. The next prime is 11331816555373. The reversal of 11331816555261 is 16255561813311.

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 11331816555261 - 2⁵ = 11331816555229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11331816555261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331811555261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65125382415 + ... + 65125382588.

It is an arithmetic number, because the mean of its divisors is an integer number (1953761475060).

Almost surely, 2^{11331816555261} is an apocalyptic number.

It is an amenable number.

11331816555261 is a deficient number, since it is larger than the sum of its proper divisors (4298275245219).

11331816555261 is a wasteful number, since it uses less digits than its factorization.

11331816555261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130250765035.

The product of its digits is 648000, while the sum is 48.

The spelling of 11331816555261 in words is "eleven trillion, three hundred thirty-one billion, eight hundred sixteen million, five hundred fifty-five thousand, two hundred sixty-one".