1191618321383 has 8 divisors (see below), whose sum is σ = 1433525800320. Its totient is φ = 967629915000.

The previous prime is 1191618321379. The next prime is 1191618321449. The reversal of 1191618321383 is 3831238161911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1191618321383 - 2² = 1191618321379 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191618321353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4479767993 + ... + 4479768258.

It is an arithmetic number, because the mean of its divisors is an integer number (179190725040).

Almost surely, 2^{1191618321383} is an apocalyptic number.

1191618321383 is a deficient number, since it is larger than the sum of its proper divisors (241907478937).

1191618321383 is an equidigital number, since it uses as much as digits as its factorization.

1191618321383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8959536277.

The product of its digits is 186624, while the sum is 47.

The spelling of 1191618321383 in words is "one trillion, one hundred ninety-one billion, six hundred eighteen million, three hundred twenty-one thousand, three hundred eighty-three".