51863651263 has 2 divisors, whose sum is σ = 51863651264. Its totient is φ = 51863651262.

The previous prime is 51863651233. The next prime is 51863651267. The reversal of 51863651263 is 36215636815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51863651263 - 2²¹ = 51861554111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51863651267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25931825631 + 25931825632.

It is an arithmetic number, because the mean of its divisors is an integer number (25931825632).

Almost surely, 2^51863651263 is an apocalyptic number.

51863651263 is a deficient number, since it is larger than the sum of its proper divisors (1).

51863651263 is an equidigital number, since it uses as much as digits as its factorization.

51863651263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 46.

The spelling of 51863651263 in words is "fifty-one billion, eight hundred sixty-three million, six hundred fifty-one thousand, two hundred sixty-three".