51630065437 has 2 divisors, whose sum is σ = 51630065438. Its totient is φ = 51630065436.

The previous prime is 51630065371. The next prime is 51630065497. The reversal of 51630065437 is 73456003615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50196610116 + 1433455321 = 224046^2 + 37861^2 .

It is a cyclic number.

It is not a de Polignac number, because 51630065437 - 2⁷ = 51630065309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51630065437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51630065497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815032718 + 25815032719.

It is an arithmetic number, because the mean of its divisors is an integer number (25815032719).

Almost surely, 2^51630065437 is an apocalyptic number.

It is an amenable number.

51630065437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51630065437 is an equidigital number, since it uses as much as digits as its factorization.

51630065437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 51630065437 in words is "fifty-one billion, six hundred thirty million, sixty-five thousand, four hundred thirty-seven".