68130676057 has 4 divisors (see below), whose sum is σ = 68131348020. Its totient is φ = 68130004096.

The previous prime is 68130676043. The next prime is 68130676063. The reversal of 68130676057 is 75067603186.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75067603186 = 2 ⋅37533801593.

It can be written as a sum of positive squares in 2 ways, for example, as 63401225616 + 4729450441 = 251796^2 + 68771^2 .

It is a cyclic number.

It is not a de Polignac number, because 68130676057 - 2⁷ = 68130675929 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 68130676057.

It is not an unprimeable number, because it can be changed into a prime (68130676037) 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, 149332 + ... + 398197.

It is an arithmetic number, because the mean of its divisors is an integer number (17032837005).

Almost surely, 2^68130676057 is an apocalyptic number.

It is an amenable number.

68130676057 is a deficient number, since it is larger than the sum of its proper divisors (671963).

68130676057 is a wasteful number, since it uses less digits than its factorization.

68130676057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671962.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 68130676057 in words is "sixty-eight billion, one hundred thirty million, six hundred seventy-six thousand, fifty-seven".