142243644989 has 8 divisors (see below), whose sum is σ = 149733659040. Its totient is φ = 134753981616.

The previous prime is 142243644979. The next prime is 142243645009. The reversal of 142243644989 is 989446342241.

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

It is a cyclic number.

It is not a de Polignac number, because 142243644989 - 2⁸ = 142243644733 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 (142243644979) 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, 1347482 + ... + 1449204.

It is an arithmetic number, because the mean of its divisors is an integer number (18716707380).

Almost surely, 2^142243644989 is an apocalyptic number.

142243644989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

142243644989 is a deficient number, since it is larger than the sum of its proper divisors (7490014051).

142243644989 is a wasteful number, since it uses less digits than its factorization.

142243644989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175339.

The product of its digits is 11943936, while the sum is 56.

The spelling of 142243644989 in words is "one hundred forty-two billion, two hundred forty-three million, six hundred forty-four thousand, nine hundred eighty-nine".