3215809785173 has 8 divisors (see below), whose sum is σ = 3235268682240. Its totient is φ = 3196353299760.

The previous prime is 3215809785137. The next prime is 3215809785203. The reversal of 3215809785173 is 3715879085123.

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

It is a cyclic number.

It is not a de Polignac number, because 3215809785173 - 2¹² = 3215809781077 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 (3215809785103) 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, 2108828 + ... + 3298298.

It is an arithmetic number, because the mean of its divisors is an integer number (404408585280).

Almost surely, 2^{3215809785173} is an apocalyptic number.

It is an amenable number.

3215809785173 is a deficient number, since it is larger than the sum of its proper divisors (19458897067).

3215809785173 is a wasteful number, since it uses less digits than its factorization.

3215809785173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205827.

The product of its (nonzero) digits is 12700800, while the sum is 59.

The spelling of 3215809785173 in words is "three trillion, two hundred fifteen billion, eight hundred nine million, seven hundred eighty-five thousand, one hundred seventy-three".