51011055169 has 2 divisors, whose sum is σ = 51011055170. Its totient is φ = 51011055168.

The previous prime is 51011055133. The next prime is 51011055181. The reversal of 51011055169 is 96155011015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41365458225 + 9645596944 = 203385^2 + 98212^2 .

It is a cyclic number.

It is not a de Polignac number, because 51011055169 - 2⁹ = 51011054657 is a prime.

It is a super-2 number, since 2×51011055169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51011055269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505527584 + 25505527585.

It is an arithmetic number, because the mean of its divisors is an integer number (25505527585).

Almost surely, 2^51011055169 is an apocalyptic number.

It is an amenable number.

51011055169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51011055169 is an equidigital number, since it uses as much as digits as its factorization.

51011055169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 34.

The spelling of 51011055169 in words is "fifty-one billion, eleven million, fifty-five thousand, one hundred sixty-nine".