51871044720511 has 2 divisors, whose sum is σ = 51871044720512. Its totient is φ = 51871044720510.

The previous prime is 51871044720457. The next prime is 51871044720541. The reversal of 51871044720511 is 11502744017815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51871044720511 - 2²¹ = 51871042623359 is a prime.

It is a super-2 number, since 2×51871044720511² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51871044720541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25935522360255 + 25935522360256.

It is an arithmetic number, because the mean of its divisors is an integer number (25935522360256).

Almost surely, 2^{51871044720511} is an apocalyptic number.

51871044720511 is a deficient number, since it is larger than the sum of its proper divisors (1).

51871044720511 is an equidigital number, since it uses as much as digits as its factorization.

51871044720511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313600, while the sum is 46.

The spelling of 51871044720511 in words is "fifty-one trillion, eight hundred seventy-one billion, forty-four million, seven hundred twenty thousand, five hundred eleven".