11550396581155 has 4 divisors (see below), whose sum is σ = 13860475897392. Its totient is φ = 9240317264920.

The previous prime is 11550396581117. The next prime is 11550396581177. The reversal of 11550396581155 is 55118569305511.

It is a happy number.

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

It is not a de Polignac number, because 11550396581155 - 2¹⁵ = 11550396548387 is a prime.

It is a super-2 number, since 2×11550396581155² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11550396581096 and 11550396581105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155039658111 + ... + 1155039658120.

It is an arithmetic number, because the mean of its divisors is an integer number (3465118974348).

Almost surely, 2^{11550396581155} is an apocalyptic number.

11550396581155 is a deficient number, since it is larger than the sum of its proper divisors (2310079316237).

11550396581155 is an equidigital number, since it uses as much as digits as its factorization.

11550396581155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310079316236.

The product of its (nonzero) digits is 4050000, while the sum is 55.

The spelling of 11550396581155 in words is "eleven trillion, five hundred fifty billion, three hundred ninety-six million, five hundred eighty-one thousand, one hundred fifty-five".