142243911938 has 6 divisors (see below), whose sum is σ = 213366667971. Its totient is φ = 71121689282.

The previous prime is 142243911919. The next prime is 142243911989. The reversal of 142243911938 is 839119342241.

It can be written as a sum of positive squares in only one way, i.e., 71121955969 + 71121955969 = 266687^2 + 266687^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=266687.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142243911892 and 142243911901.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 400031 + ... + 666717.

Almost surely, 2^142243911938 is an apocalyptic number.

142243911938 is a deficient number, since it is larger than the sum of its proper divisors (71122756033).

142243911938 is an frugal number, since it uses more digits than its factorization.

142243911938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533376 (or 266689 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The spelling of 142243911938 in words is "one hundred forty-two billion, two hundred forty-three million, nine hundred eleven thousand, nine hundred thirty-eight".