4446155661 has 8 divisors (see below), whose sum is σ = 6072798144. Its totient is φ = 2891808480.

The previous prime is 4446155641. The next prime is 4446155717. The reversal of 4446155661 is 1665516444.

It is a happy number.

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

It is not a de Polignac number, because 4446155661 - 2⁹ = 4446155149 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4446155641) 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, 18073681 + ... + 18073926.

It is an arithmetic number, because the mean of its divisors is an integer number (759099768).

Almost surely, 2^4446155661 is an apocalyptic number.

4446155661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4446155661 is a deficient number, since it is larger than the sum of its proper divisors (1626642483).

4446155661 is a wasteful number, since it uses less digits than its factorization.

4446155661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36147651.

The product of its digits is 345600, while the sum is 42.

The square root of 4446155661 is about 66679.4995557105. The cubic root of 4446155661 is about 1644.3523669579.

The spelling of 4446155661 in words is "four billion, four hundred forty-six million, one hundred fifty-five thousand, six hundred sixty-one".