51137195149 has 2 divisors, whose sum is σ = 51137195150. Its totient is φ = 51137195148.

The previous prime is 51137195113. The next prime is 51137195227. The reversal of 51137195149 is 94159173115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48568225924 + 2568969225 = 220382^2 + 50685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51137195149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51137195099 and 51137195108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51137198149) 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, 25568597574 + 25568597575.

It is an arithmetic number, because the mean of its divisors is an integer number (25568597575).

Almost surely, 2^51137195149 is an apocalyptic number.

It is an amenable number.

51137195149 is a deficient number, since it is larger than the sum of its proper divisors (1).

51137195149 is an equidigital number, since it uses as much as digits as its factorization.

51137195149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 46.

The spelling of 51137195149 in words is "fifty-one billion, one hundred thirty-seven million, one hundred ninety-five thousand, one hundred forty-nine".