51363719979877 has 2 divisors, whose sum is σ = 51363719979878. Its totient is φ = 51363719979876.

The previous prime is 51363719979841. The next prime is 51363719979947. The reversal of 51363719979877 is 77897991736315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28087784643681 + 23275935336196 = 5299791^2 + 4824514^2 .

It is a cyclic number.

It is not a de Polignac number, because 51363719979877 - 2¹⁵ = 51363719947109 is a prime.

It is a super-3 number, since 3×51363719979877³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51363719979877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51363719379877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25681859989938 + 25681859989939.

It is an arithmetic number, because the mean of its divisors is an integer number (25681859989939).

Almost surely, 2^{51363719979877} is an apocalyptic number.

It is an amenable number.

51363719979877 is a deficient number, since it is larger than the sum of its proper divisors (1).

51363719979877 is an equidigital number, since it uses as much as digits as its factorization.

51363719979877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780710640, while the sum is 82.

The spelling of 51363719979877 in words is "fifty-one trillion, three hundred sixty-three billion, seven hundred nineteen million, nine hundred seventy-nine thousand, eight hundred seventy-seven".