51387884953 has 2 divisors, whose sum is σ = 51387884954. Its totient is φ = 51387884952.

The previous prime is 51387884929. The next prime is 51387885007. The reversal of 51387884953 is 35948878315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49977732249 + 1410152704 = 223557^2 + 37552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51387884953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51387884891 and 51387884900.

It is not a weakly prime, because it can be changed into another prime (51387884153) 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, 25693942476 + 25693942477.

It is an arithmetic number, because the mean of its divisors is an integer number (25693942477).

Almost surely, 2^51387884953 is an apocalyptic number.

It is an amenable number.

51387884953 is a deficient number, since it is larger than the sum of its proper divisors (1).

51387884953 is an equidigital number, since it uses as much as digits as its factorization.

51387884953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 61.

The spelling of 51387884953 in words is "fifty-one billion, three hundred eighty-seven million, eight hundred eighty-four thousand, nine hundred fifty-three".