51646873277 has 2 divisors, whose sum is σ = 51646873278. Its totient is φ = 51646873276.

The previous prime is 51646873241. The next prime is 51646873331. The reversal of 51646873277 is 77237864615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39640411801 + 12006461476 = 199099^2 + 109574^2 .

It is a cyclic number.

It is not a de Polignac number, because 51646873277 - 2¹⁴ = 51646856893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51646803277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25823436638 + 25823436639.

It is an arithmetic number, because the mean of its divisors is an integer number (25823436639).

Almost surely, 2^51646873277 is an apocalyptic number.

It is an amenable number.

51646873277 is a deficient number, since it is larger than the sum of its proper divisors (1).

51646873277 is an equidigital number, since it uses as much as digits as its factorization.

51646873277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 56.

The spelling of 51646873277 in words is "fifty-one billion, six hundred forty-six million, eight hundred seventy-three thousand, two hundred seventy-seven".