3665636043 has 8 divisors (see below), whose sum is σ = 4888454208. Its totient is φ = 2443287624.

The previous prime is 3665636027. The next prime is 3665636053. The reversal of 3665636043 is 3406365663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3665636043 - 2⁴ = 3665636027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3665635986 and 3665636004.

It is not an unprimeable number, because it can be changed into a prime (3665636053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98805 + ... + 130742.

It is an arithmetic number, because the mean of its divisors is an integer number (611056776).

Almost surely, 2^3665636043 is an apocalyptic number.

3665636043 is a deficient number, since it is larger than the sum of its proper divisors (1222818165).

3665636043 is a wasteful number, since it uses less digits than its factorization.

3665636043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234873.

The product of its (nonzero) digits is 699840, while the sum is 42.

The square root of 3665636043 is about 60544.4963890195. The cubic root of 3665636043 is about 1541.8771794592.

The spelling of 3665636043 in words is "three billion, six hundred sixty-five million, six hundred thirty-six thousand, forty-three".