51475469687977 has 2 divisors, whose sum is σ = 51475469687978. Its totient is φ = 51475469687976.

The previous prime is 51475469687947. The next prime is 51475469688101. The reversal of 51475469687977 is 77978696457415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51418493907561 + 56975780416 = 7170669^2 + 238696^2 .

It is a cyclic number.

It is not a de Polignac number, because 51475469687977 - 2⁷ = 51475469687849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51475469687894 and 51475469687903.

It is not a weakly prime, because it can be changed into another prime (51475469687947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25737734843988 + 25737734843989.

It is an arithmetic number, because the mean of its divisors is an integer number (25737734843989).

Almost surely, 2^{51475469687977} is an apocalyptic number.

It is an amenable number.

51475469687977 is a deficient number, since it is larger than the sum of its proper divisors (1).

51475469687977 is an equidigital number, since it uses as much as digits as its factorization.

51475469687977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22404211200, while the sum is 85.

The spelling of 51475469687977 in words is "fifty-one trillion, four hundred seventy-five billion, four hundred sixty-nine million, six hundred eighty-seven thousand, nine hundred seventy-seven".