51439327673 has 2 divisors, whose sum is σ = 51439327674. Its totient is φ = 51439327672.

The previous prime is 51439327669. The next prime is 51439327691. The reversal of 51439327673 is 37672393415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39438782464 + 12000545209 = 198592^2 + 109547^2 .

It is a cyclic number.

It is not a de Polignac number, because 51439327673 - 2² = 51439327669 is a prime.

It is not a weakly prime, because it can be changed into another prime (51439321673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25719663836 + 25719663837.

It is an arithmetic number, because the mean of its divisors is an integer number (25719663837).

Almost surely, 2^51439327673 is an apocalyptic number.

It is an amenable number.

51439327673 is a deficient number, since it is larger than the sum of its proper divisors (1).

51439327673 is an equidigital number, since it uses as much as digits as its factorization.

51439327673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 50.

The spelling of 51439327673 in words is "fifty-one billion, four hundred thirty-nine million, three hundred twenty-seven thousand, six hundred seventy-three".