51660112129 has 2 divisors, whose sum is σ = 51660112130. Its totient is φ = 51660112128.

The previous prime is 51660112109. The next prime is 51660112169. The reversal of 51660112129 is 92121106615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49964319729 + 1695792400 = 223527^2 + 41180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51660112129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51660112094 and 51660112103.

It is not a weakly prime, because it can be changed into another prime (51660112109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25830056064 + 25830056065.

It is an arithmetic number, because the mean of its divisors is an integer number (25830056065).

Almost surely, 2^51660112129 is an apocalyptic number.

It is an amenable number.

51660112129 is a deficient number, since it is larger than the sum of its proper divisors (1).

51660112129 is an equidigital number, since it uses as much as digits as its factorization.

51660112129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 51660112129 in words is "fifty-one billion, six hundred sixty million, one hundred twelve thousand, one hundred twenty-nine".