11947115831375 has 16 divisors (see below), whose sum is σ = 14910259527072. Its totient is φ = 9557526659200.

The previous prime is 11947115831341. The next prime is 11947115831407. The reversal of 11947115831375 is 57313851174911.

It is a de Polignac number, because none of the positive numbers 2^k-11947115831375 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11947115831375.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6665207 + ... + 8265543.

It is an arithmetic number, because the mean of its divisors is an integer number (931891220442).

Almost surely, 2^{11947115831375} is an apocalyptic number.

11947115831375 is a deficient number, since it is larger than the sum of its proper divisors (2963143695697).

11947115831375 is an equidigital number, since it uses as much as digits as its factorization.

11947115831375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660075 (or 1660065 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 56.

The spelling of 11947115831375 in words is "eleven trillion, nine hundred forty-seven billion, one hundred fifteen million, eight hundred thirty-one thousand, three hundred seventy-five".