671365771111 has 16 divisors (see below), whose sum is σ = 814863456000. Its totient is φ = 539969696640.

The previous prime is 671365771091. The next prime is 671365771121. The reversal of 671365771111 is 111177563176.

It is a cyclic number.

It is not a de Polignac number, because 671365771111 - 2¹³ = 671365762919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671365771121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8482861 + ... + 8561638.

It is an arithmetic number, because the mean of its divisors is an integer number (50928966000).

Almost surely, 2^671365771111 is an apocalyptic number.

671365771111 is a deficient number, since it is larger than the sum of its proper divisors (143497684889).

671365771111 is a wasteful number, since it uses less digits than its factorization.

671365771111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17044854.

The product of its digits is 185220, while the sum is 46.

The spelling of 671365771111 in words is "six hundred seventy-one billion, three hundred sixty-five million, seven hundred seventy-one thousand, one hundred eleven".