1191879329915 has 4 divisors (see below), whose sum is σ = 1430255195904. Its totient is φ = 953503463928.

The previous prime is 1191879329909. The next prime is 1191879329987. The reversal of 1191879329915 is 5199239781911.

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

It is a cyclic number.

It is not a de Polignac number, because 1191879329915 - 2¹⁰ = 1191879328891 is a prime.

It is a Duffinian number.

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, 119187932987 + ... + 119187932996.

It is an arithmetic number, because the mean of its divisors is an integer number (357563798976).

Almost surely, 2^{1191879329915} is an apocalyptic number.

1191879329915 is a deficient number, since it is larger than the sum of its proper divisors (238375865989).

1191879329915 is an equidigital number, since it uses as much as digits as its factorization.

1191879329915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238375865988.

The product of its digits is 11022480, while the sum is 65.

The spelling of 1191879329915 in words is "one trillion, one hundred ninety-one billion, eight hundred seventy-nine million, three hundred twenty-nine thousand, nine hundred fifteen".