3556663824861 has 24 divisors (see below), whose sum is σ = 5871849544704. Its totient is φ = 2032195353120.

The previous prime is 3556663824859. The next prime is 3556663824871. The reversal of 3556663824861 is 1684283666553.

It is not a de Polignac number, because 3556663824861 - 2¹ = 3556663824859 is a prime.

It is a super-3 number, since 3×3556663824861³ (a number of 39 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3556663824851) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1852206 + ... + 3247151.

It is an arithmetic number, because the mean of its divisors is an integer number (244660397696).

Almost surely, 2^{3556663824861} is an apocalyptic number.

It is an amenable number.

3556663824861 is a deficient number, since it is larger than the sum of its proper divisors (2315185719843).

3556663824861 is a wasteful number, since it uses less digits than its factorization.

3556663824861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110441 (or 5110438 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 63.

The spelling of 3556663824861 in words is "three trillion, five hundred fifty-six billion, six hundred sixty-three million, eight hundred twenty-four thousand, eight hundred sixty-one".