11943120720385 has 4 divisors (see below), whose sum is σ = 14331744864468. Its totient is φ = 9554496576304.

The previous prime is 11943120720383. The next prime is 11943120720467. The reversal of 11943120720385 is 58302702134911.

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 6105252916161 + 5837867804224 = 2470881^2 + 2416168^2 .

It is a cyclic number.

It is not a de Polignac number, because 11943120720385 - 2¹ = 11943120720383 is a prime.

It is a super-3 number, since 3×11943120720385³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11943120720383) 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 3 ways as a sum of consecutive naturals, for example, 1194312072034 + ... + 1194312072043.

It is an arithmetic number, because the mean of its divisors is an integer number (3582936216117).

Almost surely, 2^{11943120720385} is an apocalyptic number.

It is an amenable number.

11943120720385 is a deficient number, since it is larger than the sum of its proper divisors (2388624144083).

11943120720385 is an equidigital number, since it uses as much as digits as its factorization.

11943120720385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388624144082.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 11943120720385 in words is "eleven trillion, nine hundred forty-three billion, one hundred twenty million, seven hundred twenty thousand, three hundred eighty-five".