3556642635545 has 16 divisors (see below), whose sum is σ = 4323190786560. Its totient is φ = 2808520937664.

The previous prime is 3556642635517. The next prime is 3556642635551. The reversal of 3556642635545 is 5455362466553.

It is a cyclic number.

It is not a de Polignac number, because 3556642635545 - 2²⁰ = 3556641586969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188447 + ... + 2673723.

It is an arithmetic number, because the mean of its divisors is an integer number (270199424160).

Almost surely, 2^{3556642635545} is an apocalyptic number.

It is an amenable number.

3556642635545 is a deficient number, since it is larger than the sum of its proper divisors (766548151015).

3556642635545 is a wasteful number, since it uses less digits than its factorization.

3556642635545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488984.

The product of its digits is 194400000, while the sum is 59.

The spelling of 3556642635545 in words is "three trillion, five hundred fifty-six billion, six hundred forty-two million, six hundred thirty-five thousand, five hundred forty-five".