3640561724 has 12 divisors (see below), whose sum is σ = 6478966200. Its totient is φ = 1789428528.

The previous prime is 3640561723. The next prime is 3640561753. The reversal of 3640561724 is 4271650463.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640561721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7712819 + ... + 7713290.

It is an arithmetic number, because the mean of its divisors is an integer number (539913850).

Almost surely, 2^3640561724 is an apocalyptic number.

It is an amenable number.

3640561724 is a deficient number, since it is larger than the sum of its proper divisors (2838404476).

3640561724 is a wasteful number, since it uses less digits than its factorization.

3640561724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15426172 (or 15426170 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 3640561724 is about 60337.0675787281. The cubic root of 3640561724 is about 1538.3534608454.

The spelling of 3640561724 in words is "three billion, six hundred forty million, five hundred sixty-one thousand, seven hundred twenty-four".