51705092149 has 2 divisors, whose sum is σ = 51705092150. Its totient is φ = 51705092148.

The previous prime is 51705092147. The next prime is 51705092213. The reversal of 51705092149 is 94129050715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46631379249 + 5073712900 = 215943^2 + 71230^2 .

It is a cyclic number.

It is not a de Polignac number, because 51705092149 - 2¹ = 51705092147 is a prime.

Together with 51705092147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51705092143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25852546074 + 25852546075.

It is an arithmetic number, because the mean of its divisors is an integer number (25852546075).

Almost surely, 2^51705092149 is an apocalyptic number.

It is an amenable number.

51705092149 is a deficient number, since it is larger than the sum of its proper divisors (1).

51705092149 is an equidigital number, since it uses as much as digits as its factorization.

51705092149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 51705092149 in words is "fifty-one billion, seven hundred five million, ninety-two thousand, one hundred forty-nine".