142243844691 has 8 divisors (see below), whose sum is σ = 204247571920. Its totient is φ = 87534673632.

The previous prime is 142243844657. The next prime is 142243844719. The reversal of 142243844691 is 196448342241.

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

It is a de Polignac number, because none of the positive numbers 2^k-142243844691 is a prime.

It is a super-2 number, since 2×142243844691² (a number of 23 digits) contains 22 as substring.

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 142243844691.

It is not an unprimeable number, because it can be changed into a prime (142243844591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823638996 + ... + 1823639073.

It is an arithmetic number, because the mean of its divisors is an integer number (25530946490).

Almost surely, 2^142243844691 is an apocalyptic number.

142243844691 is a deficient number, since it is larger than the sum of its proper divisors (62003727229).

142243844691 is a wasteful number, since it uses less digits than its factorization.

142243844691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3647278085.

The product of its digits is 1327104, while the sum is 48.

The spelling of 142243844691 in words is "one hundred forty-two billion, two hundred forty-three million, eight hundred forty-four thousand, six hundred ninety-one".