71968077877 has 2 divisors, whose sum is σ = 71968077878. Its totient is φ = 71968077876.

The previous prime is 71968077809. The next prime is 71968077953. The reversal of 71968077877 is 77877086917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71928021636 + 40056241 = 268194^2 + 6329^2 .

It is a cyclic number.

It is not a de Polignac number, because 71968077877 - 2²⁷ = 71833860149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71968075877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35984038938 + 35984038939.

It is an arithmetic number, because the mean of its divisors is an integer number (35984038939).

Almost surely, 2^71968077877 is an apocalyptic number.

It is an amenable number.

71968077877 is a deficient number, since it is larger than the sum of its proper divisors (1).

71968077877 is an equidigital number, since it uses as much as digits as its factorization.

71968077877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58084992, while the sum is 67.

The spelling of 71968077877 in words is "seventy-one billion, nine hundred sixty-eight million, seventy-seven thousand, eight hundred seventy-seven".