3661656144 has 20 divisors (see below), whose sum is σ = 9459278496. Its totient is φ = 1220552032.

The previous prime is 3661656127. The next prime is 3661656149. The reversal of 3661656144 is 4416561663.

It is a junction number, because it is equal to n+sod(n) for n = 3661656096 and 3661656105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661656149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38142204 + ... + 38142299.

Almost surely, 2^3661656144 is an apocalyptic number.

It is an amenable number.

3661656144 is an abundant number, since it is smaller than the sum of its proper divisors (5797622352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3661656144 is a wasteful number, since it uses less digits than its factorization.

3661656144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76284514 (or 76284508 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 3661656144 is about 60511.6199089068. The cubic root of 3661656144 is about 1541.3189554945.

The spelling of 3661656144 in words is "three billion, six hundred sixty-one million, six hundred fifty-six thousand, one hundred forty-four".