68731600129 has 2 divisors, whose sum is σ = 68731600130. Its totient is φ = 68731600128.

The previous prime is 68731600073. The next prime is 68731600139. The reversal of 68731600129 is 92100613786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52738203904 + 15993396225 = 229648^2 + 126465^2 .

It is a cyclic number.

It is not a de Polignac number, because 68731600129 - 2¹⁹ = 68731075841 is a prime.

It is not a weakly prime, because it can be changed into another prime (68731600139) 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, 34365800064 + 34365800065.

It is an arithmetic number, because the mean of its divisors is an integer number (34365800065).

Almost surely, 2^68731600129 is an apocalyptic number.

It is an amenable number.

68731600129 is a deficient number, since it is larger than the sum of its proper divisors (1).

68731600129 is an equidigital number, since it uses as much as digits as its factorization.

68731600129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 68731600129 in words is "sixty-eight billion, seven hundred thirty-one million, six hundred thousand, one hundred twenty-nine".