671189537069 has 2 divisors, whose sum is σ = 671189537070. Its totient is φ = 671189537068.

The previous prime is 671189537063. The next prime is 671189537077. The reversal of 671189537069 is 960735981176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552569222500 + 118620314569 = 743350^2 + 344413^2 .

It is a cyclic number.

It is not a de Polignac number, because 671189537069 - 2²⁰ = 671188488493 is a prime.

It is a super-2 number, since 2×671189537069² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671189537063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335594768534 + 335594768535.

It is an arithmetic number, because the mean of its divisors is an integer number (335594768535).

Almost surely, 2^671189537069 is an apocalyptic number.

It is an amenable number.

671189537069 is a deficient number, since it is larger than the sum of its proper divisors (1).

671189537069 is an equidigital number, since it uses as much as digits as its factorization.

671189537069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 671189537069 in words is "six hundred seventy-one billion, one hundred eighty-nine million, five hundred thirty-seven thousand, sixty-nine".