68407272853873 has 2 divisors, whose sum is σ = 68407272853874. Its totient is φ = 68407272853872.

The previous prime is 68407272853861. The next prime is 68407272853901. The reversal of 68407272853873 is 37835827270486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35028263467024 + 33379009386849 = 5918468^2 + 5777457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68407272853873 is a prime.

It is a super-2 number, since 2×68407272853873² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68407272853973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34203636426936 + 34203636426937.

It is an arithmetic number, because the mean of its divisors is an integer number (34203636426937).

Almost surely, 2^{68407272853873} is an apocalyptic number.

It is an amenable number.

68407272853873 is a deficient number, since it is larger than the sum of its proper divisors (1).

68407272853873 is an equidigital number, since it uses as much as digits as its factorization.

68407272853873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 758661120, while the sum is 70.

The spelling of 68407272853873 in words is "sixty-eight trillion, four hundred seven billion, two hundred seventy-two million, eight hundred fifty-three thousand, eight hundred seventy-three".