51782981153269 has 2 divisors, whose sum is σ = 51782981153270. Its totient is φ = 51782981153268.

The previous prime is 51782981153227. The next prime is 51782981153273. The reversal of 51782981153269 is 96235118928715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49287939768369 + 2495041384900 = 7020537^2 + 1579570^2 .

It is a cyclic number.

It is not a de Polignac number, because 51782981153269 - 2⁹ = 51782981152757 is a prime.

It is a super-2 number, since 2×51782981153269² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51782981153369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25891490576634 + 25891490576635.

It is an arithmetic number, because the mean of its divisors is an integer number (25891490576635).

Almost surely, 2^{51782981153269} is an apocalyptic number.

It is an amenable number.

51782981153269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51782981153269 is an equidigital number, since it uses as much as digits as its factorization.

51782981153269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 67.

The spelling of 51782981153269 in words is "fifty-one trillion, seven hundred eighty-two billion, nine hundred eighty-one million, one hundred fifty-three thousand, two hundred sixty-nine".