51705924671 has 2 divisors, whose sum is σ = 51705924672. Its totient is φ = 51705924670.

The previous prime is 51705924667. The next prime is 51705924691. The reversal of 51705924671 is 17642950715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51705924671 - 2² = 51705924667 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51705924631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25852962335 + 25852962336.

It is an arithmetic number, because the mean of its divisors is an integer number (25852962336).

Almost surely, 2^51705924671 is an apocalyptic number.

51705924671 is a deficient number, since it is larger than the sum of its proper divisors (1).

51705924671 is an equidigital number, since it uses as much as digits as its factorization.

51705924671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 51705924671 in words is "fifty-one billion, seven hundred five million, nine hundred twenty-four thousand, six hundred seventy-one".