142117908479 has 4 divisors (see below), whose sum is σ = 142144324920. Its totient is φ = 142091492040.

The previous prime is 142117908419. The next prime is 142117908529. The reversal of 142117908479 is 974809711241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142117908479 - 2⁸ = 142117908223 is a prime.

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 142117908479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142117908419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13200149 + ... + 13210910.

It is an arithmetic number, because the mean of its divisors is an integer number (35536081230).

Almost surely, 2^142117908479 is an apocalyptic number.

142117908479 is a deficient number, since it is larger than the sum of its proper divisors (26416441).

142117908479 is an equidigital number, since it uses as much as digits as its factorization.

142117908479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26416440.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The spelling of 142117908479 in words is "one hundred forty-two billion, one hundred seventeen million, nine hundred eight thousand, four hundred seventy-nine".