51436128329 has 2 divisors, whose sum is σ = 51436128330. Its totient is φ = 51436128328.

The previous prime is 51436128299. The next prime is 51436128343. The reversal of 51436128329 is 92382163415.

51436128329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25747411600 + 25688716729 = 160460^2 + 160277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51436128329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51436128329.

It is not a weakly prime, because it can be changed into another prime (51436128379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25718064164 + 25718064165.

It is an arithmetic number, because the mean of its divisors is an integer number (25718064165).

Almost surely, 2^51436128329 is an apocalyptic number.

It is an amenable number.

51436128329 is a deficient number, since it is larger than the sum of its proper divisors (1).

51436128329 is an equidigital number, since it uses as much as digits as its factorization.

51436128329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The spelling of 51436128329 in words is "fifty-one billion, four hundred thirty-six million, one hundred twenty-eight thousand, three hundred twenty-nine".