51267612169 has 2 divisors, whose sum is σ = 51267612170. Its totient is φ = 51267612168.

The previous prime is 51267612133. The next prime is 51267612287. The reversal of 51267612169 is 96121676215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48240411769 + 3027200400 = 219637^2 + 55020^2 .

It is a cyclic number.

It is not a de Polignac number, because 51267612169 - 2¹⁹ = 51267087881 is a prime.

It is a super-2 number, since 2×51267612169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51267612469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25633806084 + 25633806085.

It is an arithmetic number, because the mean of its divisors is an integer number (25633806085).

Almost surely, 2^51267612169 is an apocalyptic number.

It is an amenable number.

51267612169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51267612169 is an equidigital number, since it uses as much as digits as its factorization.

51267612169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The spelling of 51267612169 in words is "fifty-one billion, two hundred sixty-seven million, six hundred twelve thousand, one hundred sixty-nine".