51680635247 has 2 divisors, whose sum is σ = 51680635248. Its totient is φ = 51680635246.

The previous prime is 51680635231. The next prime is 51680635261. The reversal of 51680635247 is 74253608615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51680635247 - 2⁴ = 51680635231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51680635267) 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, 25840317623 + 25840317624.

It is an arithmetic number, because the mean of its divisors is an integer number (25840317624).

Almost surely, 2^51680635247 is an apocalyptic number.

51680635247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51680635247 is an equidigital number, since it uses as much as digits as its factorization.

51680635247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 51680635247 in words is "fifty-one billion, six hundred eighty million, six hundred thirty-five thousand, two hundred forty-seven".