1188228920813 has 16 divisors (see below), whose sum is σ = 1314841559040. Its totient is φ = 1064722671600.

The previous prime is 1188228920771. The next prime is 1188228920843. The reversal of 1188228920813 is 3180298228811.

It is a cyclic number.

It is not a de Polignac number, because 1188228920813 - 2⁴⁰ = 88717293037 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 (1188228920843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2906468 + ... + 3289986.

It is an arithmetic number, because the mean of its divisors is an integer number (82177597440).

Almost surely, 2^{1188228920813} is an apocalyptic number.

It is an amenable number.

1188228920813 is a deficient number, since it is larger than the sum of its proper divisors (126612638227).

1188228920813 is a wasteful number, since it uses less digits than its factorization.

1188228920813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387568.

The product of its (nonzero) digits is 884736, while the sum is 53.

The spelling of 1188228920813 in words is "one trillion, one hundred eighty-eight billion, two hundred twenty-eight million, nine hundred twenty thousand, eight hundred thirteen".