51630556253 has 2 divisors, whose sum is σ = 51630556254. Its totient is φ = 51630556252.

The previous prime is 51630556199. The next prime is 51630556291. The reversal of 51630556253 is 35265503615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46702235449 + 4928320804 = 216107^2 + 70202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51630556253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51630556253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51630556853) 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, 25815278126 + 25815278127.

It is an arithmetic number, because the mean of its divisors is an integer number (25815278127).

Almost surely, 2^51630556253 is an apocalyptic number.

It is an amenable number.

51630556253 is a deficient number, since it is larger than the sum of its proper divisors (1).

51630556253 is an equidigital number, since it uses as much as digits as its factorization.

51630556253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 41.

The spelling of 51630556253 in words is "fifty-one billion, six hundred thirty million, five hundred fifty-six thousand, two hundred fifty-three".