51399208793 has 2 divisors, whose sum is σ = 51399208794. Its totient is φ = 51399208792.

The previous prime is 51399208771. The next prime is 51399208801. The reversal of 51399208793 is 39780299315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36851713024 + 14547495769 = 191968^2 + 120613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51399208793 is a prime.

It is not a weakly prime, because it can be changed into another prime (51399298793) 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, 25699604396 + 25699604397.

It is an arithmetic number, because the mean of its divisors is an integer number (25699604397).

Almost surely, 2^51399208793 is an apocalyptic number.

It is an amenable number.

51399208793 is a deficient number, since it is larger than the sum of its proper divisors (1).

51399208793 is an equidigital number, since it uses as much as digits as its factorization.

51399208793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 51399208793 in words is "fifty-one billion, three hundred ninety-nine million, two hundred eight thousand, seven hundred ninety-three".