51147316877 has 2 divisors, whose sum is σ = 51147316878. Its totient is φ = 51147316876.

The previous prime is 51147316837. The next prime is 51147316937. The reversal of 51147316877 is 77861374115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28252903396 + 22894413481 = 168086^2 + 151309^2 .

It is a cyclic number.

It is not a de Polignac number, because 51147316877 - 2⁶ = 51147316813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51147316837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25573658438 + 25573658439.

It is an arithmetic number, because the mean of its divisors is an integer number (25573658439).

Almost surely, 2^51147316877 is an apocalyptic number.

It is an amenable number.

51147316877 is a deficient number, since it is larger than the sum of its proper divisors (1).

51147316877 is an equidigital number, since it uses as much as digits as its factorization.

51147316877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 50.

The spelling of 51147316877 in words is "fifty-one billion, one hundred forty-seven million, three hundred sixteen thousand, eight hundred seventy-seven".