67145056271 has 2 divisors, whose sum is σ = 67145056272. Its totient is φ = 67145056270.

The previous prime is 67145056201. The next prime is 67145056309. The reversal of 67145056271 is 17265054176.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67145056271 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67145056201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33572528135 + 33572528136.

It is an arithmetic number, because the mean of its divisors is an integer number (33572528136).

Almost surely, 2^67145056271 is an apocalyptic number.

67145056271 is a deficient number, since it is larger than the sum of its proper divisors (1).

67145056271 is an equidigital number, since it uses as much as digits as its factorization.

67145056271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 67145056271 in words is "sixty-seven billion, one hundred forty-five million, fifty-six thousand, two hundred seventy-one".