6171808867045 has 4 divisors (see below), whose sum is σ = 7406170640460. Its totient is φ = 4937447093632.

The previous prime is 6171808867039. The next prime is 6171808867061. The reversal of 6171808867045 is 5407688081716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2182305971169 + 3989502895876 = 1477263^2 + 1997374^2 .

It is a cyclic number.

It is not a de Polignac number, because 6171808867045 - 2³¹ = 6169661383397 is a prime.

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, 617180886700 + ... + 617180886709.

It is an arithmetic number, because the mean of its divisors is an integer number (1851542660115).

Almost surely, 2^{6171808867045} is an apocalyptic number.

It is an amenable number.

6171808867045 is a deficient number, since it is larger than the sum of its proper divisors (1234361773415).

6171808867045 is a wasteful number, since it uses less digits than its factorization.

6171808867045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234361773414.

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 6171808867045 in words is "six trillion, one hundred seventy-one billion, eight hundred eight million, eight hundred sixty-seven thousand, forty-five".