1189728617378 has 16 divisors (see below), whose sum is σ = 2040702264384. Its totient is φ = 509591820240.

The previous prime is 1189728617377. The next prime is 1189728617417. The reversal of 1189728617378 is 8737168279811.

It is not an unprimeable number, because it can be changed into a prime (1189728617377) 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, 24297413 + ... + 24346328.

It is an arithmetic number, because the mean of its divisors is an integer number (127543891524).

Almost surely, 2^{1189728617378} is an apocalyptic number.

1189728617378 is a deficient number, since it is larger than the sum of its proper divisors (850973647006).

1189728617378 is a wasteful number, since it uses less digits than its factorization.

1189728617378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48645497.

The product of its digits is 56899584, while the sum is 68.

The spelling of 1189728617378 in words is "one trillion, one hundred eighty-nine billion, seven hundred twenty-eight million, six hundred seventeen thousand, three hundred seventy-eight".