51895047437 has 2 divisors, whose sum is σ = 51895047438. Its totient is φ = 51895047436.

The previous prime is 51895047419. The next prime is 51895047511. The reversal of 51895047437 is 73474059815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48393840196 + 3501207241 = 219986^2 + 59171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51895047437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51895047937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25947523718 + 25947523719.

It is an arithmetic number, because the mean of its divisors is an integer number (25947523719).

Almost surely, 2^51895047437 is an apocalyptic number.

It is an amenable number.

51895047437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51895047437 is an equidigital number, since it uses as much as digits as its factorization.

51895047437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 51895047437 in words is "fifty-one billion, eight hundred ninety-five million, forty-seven thousand, four hundred thirty-seven".