51801884377 has 2 divisors, whose sum is σ = 51801884378. Its totient is φ = 51801884376.

The previous prime is 51801884363. The next prime is 51801884413. The reversal of 51801884377 is 77348810815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33538794496 + 18263089881 = 183136^2 + 135141^2 .

It is a cyclic number.

It is not a de Polignac number, because 51801884377 - 2²³ = 51793495769 is a prime.

It is not a weakly prime, because it can be changed into another prime (51801884327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25900942188 + 25900942189.

It is an arithmetic number, because the mean of its divisors is an integer number (25900942189).

Almost surely, 2^51801884377 is an apocalyptic number.

It is an amenable number.

51801884377 is a deficient number, since it is larger than the sum of its proper divisors (1).

51801884377 is an equidigital number, since it uses as much as digits as its factorization.

51801884377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 51801884377 in words is "fifty-one billion, eight hundred one million, eight hundred eighty-four thousand, three hundred seventy-seven".