51894057269 has 2 divisors, whose sum is σ = 51894057270. Its totient is φ = 51894057268.

The previous prime is 51894057239. The next prime is 51894057289. The reversal of 51894057269 is 96275049815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50189440900 + 1704616369 = 224030^2 + 41287^2 .

It is a cyclic number.

It is not a de Polignac number, because 51894057269 - 2¹² = 51894053173 is a prime.

It is a super-2 number, since 2×51894057269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51894057209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25947028634 + 25947028635.

It is an arithmetic number, because the mean of its divisors is an integer number (25947028635).

Almost surely, 2^51894057269 is an apocalyptic number.

It is an amenable number.

51894057269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51894057269 is an equidigital number, since it uses as much as digits as its factorization.

51894057269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 51894057269 in words is "fifty-one billion, eight hundred ninety-four million, fifty-seven thousand, two hundred sixty-nine".