5170918072321 has 4 divisors (see below), whose sum is σ = 5475089723652. Its totient is φ = 4866746420992.

The previous prime is 5170918072283. The next prime is 5170918072339. The reversal of 5170918072321 is 1232708190715.

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 2845631610000 + 2325286462321 = 1686900^2 + 1524889^2 .

It is a cyclic number.

It is not a de Polignac number, because 5170918072321 - 2¹³ = 5170918064129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5170918072351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152085825640 + ... + 152085825673.

It is an arithmetic number, because the mean of its divisors is an integer number (1368772430913).

Almost surely, 2^{5170918072321} is an apocalyptic number.

It is an amenable number.

5170918072321 is a deficient number, since it is larger than the sum of its proper divisors (304171651331).

5170918072321 is a wasteful number, since it uses less digits than its factorization.

5170918072321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304171651330.

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 5170918072321 in words is "five trillion, one hundred seventy billion, nine hundred eighteen million, seventy-two thousand, three hundred twenty-one".