51494722459 has 2 divisors, whose sum is σ = 51494722460. Its totient is φ = 51494722458.

The previous prime is 51494722453. The next prime is 51494722483. The reversal of 51494722459 is 95422749415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51494722459 - 2¹¹ = 51494720411 is a prime.

It is a super-2 number, since 2×51494722459² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51494722453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25747361229 + 25747361230.

It is an arithmetic number, because the mean of its divisors is an integer number (25747361230).

Almost surely, 2^51494722459 is an apocalyptic number.

51494722459 is a deficient number, since it is larger than the sum of its proper divisors (1).

51494722459 is an equidigital number, since it uses as much as digits as its factorization.

51494722459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 52.

The spelling of 51494722459 in words is "fifty-one billion, four hundred ninety-four million, seven hundred twenty-two thousand, four hundred fifty-nine".