3632729665 has 4 divisors (see below), whose sum is σ = 4359275604. Its totient is φ = 2906183728.

The previous prime is 3632729627. The next prime is 3632729669. The reversal of 3632729665 is 5669272363.

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 1698841089 + 1933888576 = 41217^2 + 43976^2 .

It is a cyclic number.

It is not a de Polignac number, because 3632729665 - 2²¹ = 3630632513 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3632729669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363272962 + ... + 363272971.

It is an arithmetic number, because the mean of its divisors is an integer number (1089818901).

Almost surely, 2^3632729665 is an apocalyptic number.

It is an amenable number.

3632729665 is a deficient number, since it is larger than the sum of its proper divisors (726545939).

3632729665 is an equidigital number, since it uses as much as digits as its factorization.

3632729665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726545938.

The product of its digits is 2449440, while the sum is 49.

The square root of 3632729665 is about 60272.1300851397. The cubic root of 3632729665 is about 1537.2494988366.

The spelling of 3632729665 in words is "three billion, six hundred thirty-two million, seven hundred twenty-nine thousand, six hundred sixty-five".