51530330689 has 2 divisors, whose sum is σ = 51530330690. Its totient is φ = 51530330688.

The previous prime is 51530330581. The next prime is 51530330707. The reversal of 51530330689 is 98603303515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37159116289 + 14371214400 = 192767^2 + 119880^2 .

It is a cyclic number.

It is not a de Polignac number, because 51530330689 - 2³³ = 42940396097 is a prime.

It is not a weakly prime, because it can be changed into another prime (51530331689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25765165344 + 25765165345.

It is an arithmetic number, because the mean of its divisors is an integer number (25765165345).

Almost surely, 2^51530330689 is an apocalyptic number.

It is an amenable number.

51530330689 is a deficient number, since it is larger than the sum of its proper divisors (1).

51530330689 is an equidigital number, since it uses as much as digits as its factorization.

51530330689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 51530330689 in words is "fifty-one billion, five hundred thirty million, three hundred thirty thousand, six hundred eighty-nine".