671571516227 has 2 divisors, whose sum is σ = 671571516228. Its totient is φ = 671571516226.

The previous prime is 671571516211. The next prime is 671571516257. The reversal of 671571516227 is 722615175176.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671571516227 - 2⁴ = 671571516211 is a prime.

It is not a weakly prime, because it can be changed into another prime (671571516257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335785758113 + 335785758114.

It is an arithmetic number, because the mean of its divisors is an integer number (335785758114).

Almost surely, 2^671571516227 is an apocalyptic number.

671571516227 is a deficient number, since it is larger than the sum of its proper divisors (1).

671571516227 is an equidigital number, since it uses as much as digits as its factorization.

671571516227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1234800, while the sum is 50.

The spelling of 671571516227 in words is "six hundred seventy-one billion, five hundred seventy-one million, five hundred sixteen thousand, two hundred twenty-seven".