11881541215 has 4 divisors (see below), whose sum is σ = 14257849464. Its totient is φ = 9505232968.

The previous prime is 11881541209. The next prime is 11881541239. The reversal of 11881541215 is 51214518811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51214518811 = 47 ⋅1089670613.

It is a cyclic number.

It is not a de Polignac number, because 11881541215 - 2⁵ = 11881541183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188154117 + ... + 1188154126.

It is an arithmetic number, because the mean of its divisors is an integer number (3564462366).

Almost surely, 2^11881541215 is an apocalyptic number.

11881541215 is a deficient number, since it is larger than the sum of its proper divisors (2376308249).

11881541215 is an equidigital number, since it uses as much as digits as its factorization.

11881541215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376308248.

The product of its digits is 12800, while the sum is 37.

The spelling of 11881541215 in words is "eleven billion, eight hundred eighty-one million, five hundred forty-one thousand, two hundred fifteen".