51785073751 has 2 divisors, whose sum is σ = 51785073752. Its totient is φ = 51785073750.

The previous prime is 51785073749. The next prime is 51785073761. The reversal of 51785073751 is 15737058715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51785073751 - 2¹ = 51785073749 is a prime.

Together with 51785073749, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51785073695 and 51785073704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51785073731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25892536875 + 25892536876.

It is an arithmetic number, because the mean of its divisors is an integer number (25892536876).

Almost surely, 2^51785073751 is an apocalyptic number.

51785073751 is a deficient number, since it is larger than the sum of its proper divisors (1).

51785073751 is an equidigital number, since it uses as much as digits as its factorization.

51785073751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1029000, while the sum is 49.

The spelling of 51785073751 in words is "fifty-one billion, seven hundred eighty-five million, seventy-three thousand, seven hundred fifty-one".