51680172827 has 2 divisors, whose sum is σ = 51680172828. Its totient is φ = 51680172826.

The previous prime is 51680172781. The next prime is 51680172833. The reversal of 51680172827 is 72827108615.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51680172827 is a prime.

It is not a weakly prime, because it can be changed into another prime (51680142827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25840086413 + 25840086414.

It is an arithmetic number, because the mean of its divisors is an integer number (25840086414).

Almost surely, 2^51680172827 is an apocalyptic number.

51680172827 is a deficient number, since it is larger than the sum of its proper divisors (1).

51680172827 is an equidigital number, since it uses as much as digits as its factorization.

51680172827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 51680172827 in words is "fifty-one billion, six hundred eighty million, one hundred seventy-two thousand, eight hundred twenty-seven".