51853503973 has 2 divisors, whose sum is σ = 51853503974. Its totient is φ = 51853503972.

The previous prime is 51853503971. The next prime is 51853503997. The reversal of 51853503973 is 37930535815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51671199969 + 182304004 = 227313^2 + 13502^2 .

It is a cyclic number.

It is not a de Polignac number, because 51853503973 - 2¹ = 51853503971 is a prime.

Together with 51853503971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51853503971) 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, 25926751986 + 25926751987.

It is an arithmetic number, because the mean of its divisors is an integer number (25926751987).

Almost surely, 2^51853503973 is an apocalyptic number.

It is an amenable number.

51853503973 is a deficient number, since it is larger than the sum of its proper divisors (1).

51853503973 is an equidigital number, since it uses as much as digits as its factorization.

51853503973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701000, while the sum is 49.

The spelling of 51853503973 in words is "fifty-one billion, eight hundred fifty-three million, five hundred three thousand, nine hundred seventy-three".