993321157865471 has 8 divisors (see below), whose sum is σ = 1027574063029200. Its totient is φ = 959068282798080.

The previous prime is 993321157865441. The next prime is 993321157865497. The reversal of 993321157865471 is 174568751123399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993321157865471 is a prime.

It is a super-3 number, since 3×993321157865471³ (a number of 46 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 993321157865395 and 993321157865404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993321157865441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74943800 + ... + 87196418.

It is an arithmetic number, because the mean of its divisors is an integer number (128446757878650).

Almost surely, 2^{993321157865471} is an apocalyptic number.

993321157865471 is a deficient number, since it is larger than the sum of its proper divisors (34252905163729).

993321157865471 is a wasteful number, since it uses less digits than its factorization.

993321157865471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15048169.

The product of its digits is 342921600, while the sum is 71.

The spelling of 993321157865471 in words is "nine hundred ninety-three trillion, three hundred twenty-one billion, one hundred fifty-seven million, eight hundred sixty-five thousand, four hundred seventy-one".