671322271553 has 2 divisors, whose sum is σ = 671322271554. Its totient is φ = 671322271552.

The previous prime is 671322271517. The next prime is 671322271651. The reversal of 671322271553 is 355172223176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641229389824 + 30092881729 = 800768^2 + 173473^2 .

It is a cyclic number.

It is not a de Polignac number, because 671322271553 - 2²⁸ = 671053836097 is a prime.

It is not a weakly prime, because it can be changed into another prime (671322271453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335661135776 + 335661135777.

It is an arithmetic number, because the mean of its divisors is an integer number (335661135777).

Almost surely, 2^671322271553 is an apocalyptic number.

It is an amenable number.

671322271553 is a deficient number, since it is larger than the sum of its proper divisors (1).

671322271553 is an equidigital number, since it uses as much as digits as its factorization.

671322271553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 44.

The spelling of 671322271553 in words is "six hundred seventy-one billion, three hundred twenty-two million, two hundred seventy-one thousand, five hundred fifty-three".