1188643669242 has 16 divisors (see below), whose sum is σ = 2502407724960. Its totient is φ = 375361158672.

The previous prime is 1188643669237. The next prime is 1188643669253. The reversal of 1188643669242 is 2429663468811.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5213349313 + ... + 5213349540.

It is an arithmetic number, because the mean of its divisors is an integer number (156400482810).

Almost surely, 2^{1188643669242} is an apocalyptic number.

1188643669242 is an abundant number, since it is smaller than the sum of its proper divisors (1313764055718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1188643669242 is a wasteful number, since it uses less digits than its factorization.

1188643669242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10426698877.

The product of its digits is 23887872, while the sum is 60.

The spelling of 1188643669242 in words is "one trillion, one hundred eighty-eight billion, six hundred forty-three million, six hundred sixty-nine thousand, two hundred forty-two".