56678351329 has 2 divisors, whose sum is σ = 56678351330. Its totient is φ = 56678351328.

The previous prime is 56678351281. The next prime is 56678351351. The reversal of 56678351329 is 92315387665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47381534929 + 9296816400 = 217673^2 + 96420^2 .

It is a cyclic number.

It is not a de Polignac number, because 56678351329 - 2²³ = 56669962721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56678351329.

It is not a weakly prime, because it can be changed into another prime (56678351029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28339175664 + 28339175665.

It is an arithmetic number, because the mean of its divisors is an integer number (28339175665).

Almost surely, 2^56678351329 is an apocalyptic number.

It is an amenable number.

56678351329 is a deficient number, since it is larger than the sum of its proper divisors (1).

56678351329 is an equidigital number, since it uses as much as digits as its factorization.

56678351329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 55.

The spelling of 56678351329 in words is "fifty-six billion, six hundred seventy-eight million, three hundred fifty-one thousand, three hundred twenty-nine".