68840820271 has 2 divisors, whose sum is σ = 68840820272. Its totient is φ = 68840820270.

The previous prime is 68840820149. The next prime is 68840820317. The reversal of 68840820271 is 17202804886.

It is a happy number.

It is an a-pointer prime, because the next prime (68840820317) can be obtained adding 68840820271 to its sum of digits (46).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68840820271 - 2⁷ = 68840820143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68840827271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34420410135 + 34420410136.

It is an arithmetic number, because the mean of its divisors is an integer number (34420410136).

Almost surely, 2^68840820271 is an apocalyptic number.

68840820271 is a deficient number, since it is larger than the sum of its proper divisors (1).

68840820271 is an equidigital number, since it uses as much as digits as its factorization.

68840820271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 46.

It can be divided in two parts, 68840 and 820271, that added together give a triangular number (889111 = T₁₃₃₃).

The spelling of 68840820271 in words is "sixty-eight billion, eight hundred forty million, eight hundred twenty thousand, two hundred seventy-one".