671615170201 has 2 divisors, whose sum is σ = 671615170202. Its totient is φ = 671615170200.

The previous prime is 671615170181. The next prime is 671615170211. The reversal of 671615170201 is 102071516176.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434908594576 + 236706575625 = 659476^2 + 486525^2 .

It is a cyclic number.

It is not a de Polignac number, because 671615170201 - 2²⁷ = 671480952473 is a prime.

It is not a weakly prime, because it can be changed into another prime (671615170211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335807585100 + 335807585101.

It is an arithmetic number, because the mean of its divisors is an integer number (335807585101).

Almost surely, 2^671615170201 is an apocalyptic number.

It is an amenable number.

671615170201 is a deficient number, since it is larger than the sum of its proper divisors (1).

671615170201 is an equidigital number, since it uses as much as digits as its factorization.

671615170201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 37.

Adding to 671615170201 its reverse (102071516176), we get a palindrome (773686686377).

The spelling of 671615170201 in words is "six hundred seventy-one billion, six hundred fifteen million, one hundred seventy thousand, two hundred one".