3655665563 has 8 divisors (see below), whose sum is σ = 4161390336. Its totient is φ = 3178839400.

The previous prime is 3655665539. The next prime is 3655665577.

It is a happy number.

3655665563 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 3655665563 - 2¹² = 3655661467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3655665163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7224383 + ... + 7224888.

It is an arithmetic number, because the mean of its divisors is an integer number (520173792).

Almost surely, 2^3655665563 is an apocalyptic number.

3655665563 is a deficient number, since it is larger than the sum of its proper divisors (505724773).

3655665563 is a wasteful number, since it uses less digits than its factorization.

3655665563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14449305.

The product of its digits is 7290000, while the sum is 50.

The square root of 3655665563 is about 60462.1002198898. The cubic root of 3655665563 is about 1540.4779484346.

The spelling of 3655665563 in words is "three billion, six hundred fifty-five million, six hundred sixty-five thousand, five hundred sixty-three".