51316502563 has 2 divisors, whose sum is σ = 51316502564. Its totient is φ = 51316502562.

The previous prime is 51316502551. The next prime is 51316502579. The reversal of 51316502563 is 36520561315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51316502563 - 2¹³ = 51316494371 is a prime.

It is not a weakly prime, because it can be changed into another prime (51316502063) 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, 25658251281 + 25658251282.

It is an arithmetic number, because the mean of its divisors is an integer number (25658251282).

Almost surely, 2^51316502563 is an apocalyptic number.

51316502563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51316502563 is an equidigital number, since it uses as much as digits as its factorization.

51316502563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 51316502563 in words is "fifty-one billion, three hundred sixteen million, five hundred two thousand, five hundred sixty-three".