3644243578 has 16 divisors (see below), whose sum is σ = 5576087304. Its totient is φ = 1785764160.

The previous prime is 3644243531. The next prime is 3644243609. The reversal of 3644243578 is 8753424463.

It can be written as a sum of positive squares in 4 ways, for example, as 857142729 + 2787100849 = 29277^2 + 52793^2 .

It is a super-2 number, since 2×3644243578² = 26561022511588484168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20125 + ... + 87712.

Almost surely, 2^3644243578 is an apocalyptic number.

3644243578 is a deficient number, since it is larger than the sum of its proper divisors (1931843726).

3644243578 is a wasteful number, since it uses less digits than its factorization.

3644243578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108177.

The product of its digits is 1935360, while the sum is 46.

The square root of 3644243578 is about 60367.5705822257. The cubic root of 3644243578 is about 1538.8718867489.

The spelling of 3644243578 in words is "three billion, six hundred forty-four million, two hundred forty-three thousand, five hundred seventy-eight".