51185968753 has 2 divisors, whose sum is σ = 51185968754. Its totient is φ = 51185968752.

The previous prime is 51185968721. The next prime is 51185968829. The reversal of 51185968753 is 35786958115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32287417969 + 18898550784 = 179687^2 + 137472^2 .

It is a cyclic number.

It is not a de Polignac number, because 51185968753 - 2⁵ = 51185968721 is a prime.

It is not a weakly prime, because it can be changed into another prime (51185918753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25592984376 + 25592984377.

It is an arithmetic number, because the mean of its divisors is an integer number (25592984377).

Almost surely, 2^51185968753 is an apocalyptic number.

It is an amenable number.

51185968753 is a deficient number, since it is larger than the sum of its proper divisors (1).

51185968753 is an equidigital number, since it uses as much as digits as its factorization.

51185968753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072000, while the sum is 58.

The spelling of 51185968753 in words is "fifty-one billion, one hundred eighty-five million, nine hundred sixty-eight thousand, seven hundred fifty-three".