1189827385779 has 8 divisors (see below), whose sum is σ = 1586446446592. Its totient is φ = 793213291080.

The previous prime is 1189827385729. The next prime is 1189827385783. The reversal of 1189827385779 is 9775837289811.

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

It is not a de Polignac number, because 1189827385779 - 2⁷ = 1189827385651 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 1189827385779.

It is not an unprimeable number, because it can be changed into a prime (1189827385729) 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, 640987 + ... + 1670484.

It is an arithmetic number, because the mean of its divisors is an integer number (198305805824).

Almost surely, 2^{1189827385779} is an apocalyptic number.

1189827385779 is a deficient number, since it is larger than the sum of its proper divisors (396619060813).

1189827385779 is a wasteful number, since it uses less digits than its factorization.

1189827385779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483057.

The product of its digits is 426746880, while the sum is 75.

The spelling of 1189827385779 in words is "one trillion, one hundred eighty-nine billion, eight hundred twenty-seven million, three hundred eighty-five thousand, seven hundred seventy-nine".