51766175977 has 2 divisors, whose sum is σ = 51766175978. Its totient is φ = 51766175976.

The previous prime is 51766175971. The next prime is 51766176013. The reversal of 51766175977 is 77957166715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49844581081 + 1921594896 = 223259^2 + 43836^2 .

It is a cyclic number.

It is not a de Polignac number, because 51766175977 - 2²³ = 51757787369 is a prime.

It is not a weakly prime, because it can be changed into another prime (51766175971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25883087988 + 25883087989.

It is an arithmetic number, because the mean of its divisors is an integer number (25883087989).

Almost surely, 2^51766175977 is an apocalyptic number.

It is an amenable number.

51766175977 is a deficient number, since it is larger than the sum of its proper divisors (1).

51766175977 is an equidigital number, since it uses as much as digits as its factorization.

51766175977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19448100, while the sum is 61.

The spelling of 51766175977 in words is "fifty-one billion, seven hundred sixty-six million, one hundred seventy-five thousand, nine hundred seventy-seven".