1188389664365 has 16 divisors (see below), whose sum is σ = 1460908597680. Its totient is φ = 927486266880.

The previous prime is 1188389664361. The next prime is 1188389664367. The reversal of 1188389664365 is 5634669838811.

It can be written as a sum of positive squares in 8 ways, for example, as 389348544484 + 799041119881 = 623978^2 + 893891^2 .

It is not a de Polignac number, because 1188389664365 - 2² = 1188389664361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1188389664295 and 1188389664304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188389664361) 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, 5684267 + ... + 5889623.

It is an arithmetic number, because the mean of its divisors is an integer number (91306787355).

Almost surely, 2^{1188389664365} is an apocalyptic number.

It is an amenable number.

1188389664365 is a deficient number, since it is larger than the sum of its proper divisors (272518933315).

1188389664365 is a wasteful number, since it uses less digits than its factorization.

1188389664365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233632.

The product of its digits is 179159040, while the sum is 68.

The spelling of 1188389664365 in words is "one trillion, one hundred eighty-eight billion, three hundred eighty-nine million, six hundred sixty-four thousand, three hundred sixty-five".