51804748777 has 2 divisors, whose sum is σ = 51804748778. Its totient is φ = 51804748776.

The previous prime is 51804748711. The next prime is 51804748847. The reversal of 51804748777 is 77784740815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40812484441 + 10992264336 = 202021^2 + 104844^2 .

It is a cyclic number.

It is not a de Polignac number, because 51804748777 - 2⁷ = 51804748649 is a prime.

It is not a weakly prime, because it can be changed into another prime (51804748277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25902374388 + 25902374389.

It is an arithmetic number, because the mean of its divisors is an integer number (25902374389).

Almost surely, 2^51804748777 is an apocalyptic number.

It is an amenable number.

51804748777 is a deficient number, since it is larger than the sum of its proper divisors (1).

51804748777 is an equidigital number, since it uses as much as digits as its factorization.

51804748777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12293120, while the sum is 58.

The spelling of 51804748777 in words is "fifty-one billion, eight hundred four million, seven hundred forty-eight thousand, seven hundred seventy-seven".