51905535169 has 2 divisors, whose sum is σ = 51905535170. Its totient is φ = 51905535168.

The previous prime is 51905535061. The next prime is 51905535233. The reversal of 51905535169 is 96153550915.

51905535169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51852754944 + 52780225 = 227712^2 + 7265^2 .

It is a cyclic number.

It is not a de Polignac number, because 51905535169 - 2⁷ = 51905535041 is a prime.

It is a super-2 number, since 2×51905535169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51905535469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25952767584 + 25952767585.

It is an arithmetic number, because the mean of its divisors is an integer number (25952767585).

Almost surely, 2^51905535169 is an apocalyptic number.

It is an amenable number.

51905535169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51905535169 is an equidigital number, since it uses as much as digits as its factorization.

51905535169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 911250, while the sum is 49.

The spelling of 51905535169 in words is "fifty-one billion, nine hundred five million, five hundred thirty-five thousand, one hundred sixty-nine".