50128859761 has 2 divisors, whose sum is σ = 50128859762. Its totient is φ = 50128859760.

The previous prime is 50128859723. The next prime is 50128859843. The reversal of 50128859761 is 16795882105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28859554161 + 21269305600 = 169881^2 + 145840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50128859761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50128859699 and 50128859708.

It is not a weakly prime, because it can be changed into another prime (50128859161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25064429880 + 25064429881.

It is an arithmetic number, because the mean of its divisors is an integer number (25064429881).

Almost surely, 2^50128859761 is an apocalyptic number.

It is an amenable number.

50128859761 is a deficient number, since it is larger than the sum of its proper divisors (1).

50128859761 is an equidigital number, since it uses as much as digits as its factorization.

50128859761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 50128859761 in words is "fifty billion, one hundred twenty-eight million, eight hundred fifty-nine thousand, seven hundred sixty-one".