51938679269 has 2 divisors, whose sum is σ = 51938679270. Its totient is φ = 51938679268.

The previous prime is 51938679211. The next prime is 51938679307. The reversal of 51938679269 is 96297683915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44294674369 + 7644004900 = 210463^2 + 87430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51938679269 is a prime.

It is a super-3 number, since 3×51938679269³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51938676269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25969339634 + 25969339635.

It is an arithmetic number, because the mean of its divisors is an integer number (25969339635).

Almost surely, 2^51938679269 is an apocalyptic number.

It is an amenable number.

51938679269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51938679269 is an equidigital number, since it uses as much as digits as its factorization.

51938679269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44089920, while the sum is 65.

The spelling of 51938679269 in words is "fifty-one billion, nine hundred thirty-eight million, six hundred seventy-nine thousand, two hundred sixty-nine".