3452721472665 has 24 divisors (see below), whose sum is σ = 5987528431560. Its totient is φ = 1840586463744.

The previous prime is 3452721472597. The next prime is 3452721472699. The reversal of 3452721472665 is 5662741272543.

3452721472665 is a `hidden beast` number, since 3 + 45 + 2 + 72 + 1 + 472 + 6 + 65 = 666.

3452721472665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2032567056 + 3450688905609 = 45084^2 + 1857603^2 .

It is not a de Polignac number, because 3452721472665 - 2¹⁷ = 3452721341593 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17923722 + ... + 18115331.

It is an arithmetic number, because the mean of its divisors is an integer number (249480351315).

Almost surely, 2^{3452721472665} is an apocalyptic number.

It is an amenable number.

3452721472665 is a deficient number, since it is larger than the sum of its proper divisors (2534806958895).

3452721472665 is a wasteful number, since it uses less digits than its factorization.

3452721472665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36041193 (or 36041190 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 54.

The spelling of 3452721472665 in words is "three trillion, four hundred fifty-two billion, seven hundred twenty-one million, four hundred seventy-two thousand, six hundred sixty-five".