3072172936321 has 4 divisors (see below), whose sum is σ = 3072743871444. Its totient is φ = 3071602001200.

The previous prime is 3072172936319. The next prime is 3072172936331. The reversal of 3072172936321 is 1236392712703.

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 399536503921 + 2672636432400 = 632089^2 + 1634820^2 .

It is a cyclic number.

It is not a de Polignac number, because 3072172936321 - 2¹ = 3072172936319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3072172936331) 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, 285459490 + ... + 285470251.

It is an arithmetic number, because the mean of its divisors is an integer number (768185967861).

Almost surely, 2^{3072172936321} is an apocalyptic number.

It is an amenable number.

3072172936321 is a deficient number, since it is larger than the sum of its proper divisors (570935123).

3072172936321 is an equidigital number, since it uses as much as digits as its factorization.

3072172936321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570935122.

The product of its (nonzero) digits is 571536, while the sum is 46.

The spelling of 3072172936321 in words is "three trillion, seventy-two billion, one hundred seventy-two million, nine hundred thirty-six thousand, three hundred twenty-one".