51510123399937 has 2 divisors, whose sum is σ = 51510123399938. Its totient is φ = 51510123399936.

The previous prime is 51510123399919. The next prime is 51510123400091. The reversal of 51510123399937 is 73999332101515.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42694711106161 + 8815412293776 = 6534119^2 + 2969076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51510123399937 is a prime.

It is not a weakly prime, because it can be changed into another prime (51510123399337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25755061699968 + 25755061699969.

It is an arithmetic number, because the mean of its divisors is an integer number (25755061699969).

Almost surely, 2^{51510123399937} is an apocalyptic number.

It is an amenable number.

51510123399937 is a deficient number, since it is larger than the sum of its proper divisors (1).

51510123399937 is an equidigital number, since it uses as much as digits as its factorization.

51510123399937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6889050, while the sum is 58.

The spelling of 51510123399937 in words is "fifty-one trillion, five hundred ten billion, one hundred twenty-three million, three hundred ninety-nine thousand, nine hundred thirty-seven".