51810812429 has 2 divisors, whose sum is σ = 51810812430. Its totient is φ = 51810812428.

The previous prime is 51810812407. The next prime is 51810812539. The reversal of 51810812429 is 92421801815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48323909929 + 3486902500 = 219827^2 + 59050^2 .

It is a cyclic number.

It is not a de Polignac number, because 51810812429 - 2¹⁶ = 51810746893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51810862429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25905406214 + 25905406215.

It is an arithmetic number, because the mean of its divisors is an integer number (25905406215).

Almost surely, 2^51810812429 is an apocalyptic number.

It is an amenable number.

51810812429 is a deficient number, since it is larger than the sum of its proper divisors (1).

51810812429 is an equidigital number, since it uses as much as digits as its factorization.

51810812429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 51810812429 in words is "fifty-one billion, eight hundred ten million, eight hundred twelve thousand, four hundred twenty-nine".