51061065149 has 2 divisors, whose sum is σ = 51061065150. Its totient is φ = 51061065148.

The previous prime is 51061065109. The next prime is 51061065157. The reversal of 51061065149 is 94156016015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34208352025 + 16852713124 = 184955^2 + 129818^2 .

It is a cyclic number.

It is not a de Polignac number, because 51061065149 - 2⁸ = 51061064893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51061065109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530532574 + 25530532575.

It is an arithmetic number, because the mean of its divisors is an integer number (25530532575).

Almost surely, 2^51061065149 is an apocalyptic number.

It is an amenable number.

51061065149 is a deficient number, since it is larger than the sum of its proper divisors (1).

51061065149 is an equidigital number, since it uses as much as digits as its factorization.

51061065149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 51061065149 in words is "fifty-one billion, sixty-one million, sixty-five thousand, one hundred forty-nine".