51900648853 has 2 divisors, whose sum is σ = 51900648854. Its totient is φ = 51900648852.

The previous prime is 51900648823. The next prime is 51900648869. The reversal of 51900648853 is 35884600915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46722119409 + 5178529444 = 216153^2 + 71962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51900648853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51900648797 and 51900648806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51900648823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25950324426 + 25950324427.

It is an arithmetic number, because the mean of its divisors is an integer number (25950324427).

Almost surely, 2^51900648853 is an apocalyptic number.

It is an amenable number.

51900648853 is a deficient number, since it is larger than the sum of its proper divisors (1).

51900648853 is an equidigital number, since it uses as much as digits as its factorization.

51900648853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 51900648853 in words is "fifty-one billion, nine hundred million, six hundred forty-eight thousand, eight hundred fifty-three".