68731600073 has 2 divisors, whose sum is σ = 68731600074. Its totient is φ = 68731600072.

The previous prime is 68731600031. The next prime is 68731600129. The reversal of 68731600073 is 37000613786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47588113609 + 21143486464 = 218147^2 + 145408^2 .

It is a cyclic number.

It is not a de Polignac number, because 68731600073 - 2⁸ = 68731599817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68731600073.

It is not a weakly prime, because it can be changed into another prime (68731300073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34365800036 + 34365800037.

It is an arithmetic number, because the mean of its divisors is an integer number (34365800037).

Almost surely, 2^68731600073 is an apocalyptic number.

It is an amenable number.

68731600073 is a deficient number, since it is larger than the sum of its proper divisors (1).

68731600073 is an equidigital number, since it uses as much as digits as its factorization.

68731600073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 68731600073 in words is "sixty-eight billion, seven hundred thirty-one million, six hundred thousand, seventy-three".