51041729657 has 2 divisors, whose sum is σ = 51041729658. Its totient is φ = 51041729656.

The previous prime is 51041729633. The next prime is 51041729707. The reversal of 51041729657 is 75692714015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50471666281 + 570063376 = 224659^2 + 23876^2 .

It is a cyclic number.

It is not a de Polignac number, because 51041729657 - 2²⁴ = 51024952441 is a prime.

It is not a weakly prime, because it can be changed into another prime (51041722657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25520864828 + 25520864829.

It is an arithmetic number, because the mean of its divisors is an integer number (25520864829).

Almost surely, 2^51041729657 is an apocalyptic number.

It is an amenable number.

51041729657 is a deficient number, since it is larger than the sum of its proper divisors (1).

51041729657 is an equidigital number, since it uses as much as digits as its factorization.

51041729657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 51041729657 in words is "fifty-one billion, forty-one million, seven hundred twenty-nine thousand, six hundred fifty-seven".