51166261271 has 2 divisors, whose sum is σ = 51166261272. Its totient is φ = 51166261270.

The previous prime is 51166261189. The next prime is 51166261319. The reversal of 51166261271 is 17216266115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51166261271 - 2³⁴ = 33986392087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51166261171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25583130635 + 25583130636.

It is an arithmetic number, because the mean of its divisors is an integer number (25583130636).

Almost surely, 2^51166261271 is an apocalyptic number.

51166261271 is a deficient number, since it is larger than the sum of its proper divisors (1).

51166261271 is an equidigital number, since it uses as much as digits as its factorization.

51166261271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The spelling of 51166261271 in words is "fifty-one billion, one hundred sixty-six million, two hundred sixty-one thousand, two hundred seventy-one".