51361630571 has 2 divisors, whose sum is σ = 51361630572. Its totient is φ = 51361630570.

The previous prime is 51361630519. The next prime is 51361630603. The reversal of 51361630571 is 17503616315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51361630571 - 2¹⁸ = 51361368427 is a prime.

It is not a weakly prime, because it can be changed into another prime (51361630501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25680815285 + 25680815286.

It is an arithmetic number, because the mean of its divisors is an integer number (25680815286).

Almost surely, 2^51361630571 is an apocalyptic number.

51361630571 is a deficient number, since it is larger than the sum of its proper divisors (1).

51361630571 is an equidigital number, since it uses as much as digits as its factorization.

51361630571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The spelling of 51361630571 in words is "fifty-one billion, three hundred sixty-one million, six hundred thirty thousand, five hundred seventy-one".