51616066459 has 2 divisors, whose sum is σ = 51616066460. Its totient is φ = 51616066458.

The previous prime is 51616066393. The next prime is 51616066543. The reversal of 51616066459 is 95466061615.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51616066459 - 2¹³ = 51616058267 is a prime.

It is not a weakly prime, because it can be changed into another prime (51616064459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808033229 + 25808033230.

It is an arithmetic number, because the mean of its divisors is an integer number (25808033230).

Almost surely, 2^51616066459 is an apocalyptic number.

51616066459 is a deficient number, since it is larger than the sum of its proper divisors (1).

51616066459 is an equidigital number, since it uses as much as digits as its factorization.

51616066459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 51616066459 in words is "fifty-one billion, six hundred sixteen million, sixty-six thousand, four hundred fifty-nine".