142730864639 has 4 divisors (see below), whose sum is σ = 155706397800. Its totient is φ = 129755331480.

The previous prime is 142730864603. The next prime is 142730864659. The reversal of 142730864639 is 936468037241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142730864639 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 (142730864659) 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, 6487766564 + ... + 6487766585.

It is an arithmetic number, because the mean of its divisors is an integer number (38926599450).

Almost surely, 2^142730864639 is an apocalyptic number.

142730864639 is a deficient number, since it is larger than the sum of its proper divisors (12975533161).

142730864639 is a wasteful number, since it uses less digits than its factorization.

142730864639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12975533160.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 142730864639 in words is "one hundred forty-two billion, seven hundred thirty million, eight hundred sixty-four thousand, six hundred thirty-nine".