68641369273 has 2 divisors, whose sum is σ = 68641369274. Its totient is φ = 68641369272.

The previous prime is 68641369253. The next prime is 68641369337. The reversal of 68641369273 is 37296314686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65590795449 + 3050573824 = 256107^2 + 55232^2 .

It is a cyclic number.

It is not a de Polignac number, because 68641369273 - 2¹³ = 68641361081 is a prime.

It is not a weakly prime, because it can be changed into another prime (68641369253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34320684636 + 34320684637.

It is an arithmetic number, because the mean of its divisors is an integer number (34320684637).

Almost surely, 2^68641369273 is an apocalyptic number.

It is an amenable number.

68641369273 is a deficient number, since it is larger than the sum of its proper divisors (1).

68641369273 is an equidigital number, since it uses as much as digits as its factorization.

68641369273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 55.

The spelling of 68641369273 in words is "sixty-eight billion, six hundred forty-one million, three hundred sixty-nine thousand, two hundred seventy-three".