671045444771015 has 4 divisors (see below), whose sum is σ = 805254533725224. Its totient is φ = 536836355816808.

The previous prime is 671045444770913. The next prime is 671045444771029. The reversal of 671045444771015 is 510177444540176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671045444771015 - 2¹⁴ = 671045444754631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67104544477097 + ... + 67104544477106.

It is an arithmetic number, because the mean of its divisors is an integer number (201313633431306).

Almost surely, 2^{671045444771015} is an apocalyptic number.

671045444771015 is a deficient number, since it is larger than the sum of its proper divisors (134209088954209).

671045444771015 is a wasteful number, since it uses less digits than its factorization.

671045444771015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134209088954208.

The product of its (nonzero) digits is 13171200, while the sum is 56.

The spelling of 671045444771015 in words is "six hundred seventy-one trillion, forty-five billion, four hundred forty-four million, seven hundred seventy-one thousand, fifteen".