68143933877 has 4 divisors (see below), whose sum is σ = 68144546400. Its totient is φ = 68143321356.

The previous prime is 68143933861. The next prime is 68143933901. The reversal of 68143933877 is 77833934186.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77833934186 = 2 ⋅38916967093.

It is a cyclic number.

It is not a de Polignac number, because 68143933877 - 2⁴ = 68143933861 is a prime.

It is a super-2 number, since 2×68143933877² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68143936877) 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, 87113 + ... + 379310.

It is an arithmetic number, because the mean of its divisors is an integer number (17036136600).

Almost surely, 2^68143933877 is an apocalyptic number.

It is an amenable number.

68143933877 is a deficient number, since it is larger than the sum of its proper divisors (612523).

68143933877 is a wasteful number, since it uses less digits than its factorization.

68143933877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612522.

The product of its digits is 18289152, while the sum is 59.

The spelling of 68143933877 in words is "sixty-eight billion, one hundred forty-three million, nine hundred thirty-three thousand, eight hundred seventy-seven".