68239542773 has 4 divisors (see below), whose sum is σ = 69826508928. Its totient is φ = 66652576620.

The previous prime is 68239542757. The next prime is 68239542793. The reversal of 68239542773 is 37724593286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37724593286 = 2 ⋅18862296643.

It is a cyclic number.

It is not a de Polignac number, because 68239542773 - 2⁴ = 68239542757 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 (68239542703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793483013 + ... + 793483098.

It is an arithmetic number, because the mean of its divisors is an integer number (17456627232).

Almost surely, 2^68239542773 is an apocalyptic number.

It is an amenable number.

68239542773 is a deficient number, since it is larger than the sum of its proper divisors (1586966155).

68239542773 is a wasteful number, since it uses less digits than its factorization.

68239542773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586966154.

The product of its digits is 15240960, while the sum is 56.

The spelling of 68239542773 in words is "sixty-eight billion, two hundred thirty-nine million, five hundred forty-two thousand, seven hundred seventy-three".