3609529645 has 4 divisors (see below), whose sum is σ = 4331435580. Its totient is φ = 2887623712.

The previous prime is 3609529643. The next prime is 3609529667. The reversal of 3609529645 is 5469259063.

It is a happy number.

3609529645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5469259063 = 137 ⋅39921599.

It can be written as a sum of positive squares in 2 ways, for example, as 1226820676 + 2382708969 = 35026^2 + 48813^2 .

It is a cyclic number.

It is not a de Polignac number, because 3609529645 - 2¹ = 3609529643 is a prime.

It is a super-3 number, since 3×3609529645³ (a number of 30 digits) contains 333 as substring.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (3609529643) 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, 360952960 + ... + 360952969.

It is an arithmetic number, because the mean of its divisors is an integer number (1082858895).

Almost surely, 2^3609529645 is an apocalyptic number.

It is an amenable number.

3609529645 is a deficient number, since it is larger than the sum of its proper divisors (721905935).

3609529645 is an equidigital number, since it uses as much as digits as its factorization.

3609529645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721905934.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The square root of 3609529645 is about 60079.3612233020. The cubic root of 3609529645 is about 1533.9700171264.

The spelling of 3609529645 in words is "three billion, six hundred nine million, five hundred twenty-nine thousand, six hundred forty-five".