68130071773 has 2 divisors, whose sum is σ = 68130071774. Its totient is φ = 68130071772.

The previous prime is 68130071689. The next prime is 68130071783. The reversal of 68130071773 is 37717003186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42190392409 + 25939679364 = 205403^2 + 161058^2 .

It is a cyclic number.

It is not a de Polignac number, because 68130071773 - 2²⁹ = 67593200861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68130071783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34065035886 + 34065035887.

It is an arithmetic number, because the mean of its divisors is an integer number (34065035887).

Almost surely, 2^68130071773 is an apocalyptic number.

It is an amenable number.

68130071773 is a deficient number, since it is larger than the sum of its proper divisors (1).

68130071773 is an equidigital number, since it uses as much as digits as its factorization.

68130071773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 43.

The spelling of 68130071773 in words is "sixty-eight billion, one hundred thirty million, seventy-one thousand, seven hundred seventy-three".