51450685801 has 2 divisors, whose sum is σ = 51450685802. Its totient is φ = 51450685800.

The previous prime is 51450685757. The next prime is 51450685807. The reversal of 51450685801 is 10858605415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51065152576 + 385533225 = 225976^2 + 19635^2 .

It is a cyclic number.

It is not a de Polignac number, because 51450685801 - 2⁷ = 51450685673 is a prime.

It is not a weakly prime, because it can be changed into another prime (51450685807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725342900 + 25725342901.

It is an arithmetic number, because the mean of its divisors is an integer number (25725342901).

Almost surely, 2^51450685801 is an apocalyptic number.

It is an amenable number.

51450685801 is a deficient number, since it is larger than the sum of its proper divisors (1).

51450685801 is an equidigital number, since it uses as much as digits as its factorization.

51450685801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192000, while the sum is 43.

The spelling of 51450685801 in words is "fifty-one billion, four hundred fifty million, six hundred eighty-five thousand, eight hundred one".