3661443109 has 4 divisors (see below), whose sum is σ = 3671934700. Its totient is φ = 3650951520.

The previous prime is 3661443101. The next prime is 3661443113. The reversal of 3661443109 is 9013441663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3057758209 + 603684900 = 55297^2 + 24570^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661443109 - 2³ = 3661443101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661443101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5245272 + ... + 5245969.

It is an arithmetic number, because the mean of its divisors is an integer number (917983675).

Almost surely, 2^3661443109 is an apocalyptic number.

It is an amenable number.

3661443109 is a deficient number, since it is larger than the sum of its proper divisors (10491591).

3661443109 is a wasteful number, since it uses less digits than its factorization.

3661443109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10491590.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 3661443109 is about 60509.8596015558. The cubic root of 3661443109 is about 1541.2890636242.

The spelling of 3661443109 in words is "three billion, six hundred sixty-one million, four hundred forty-three thousand, one hundred nine".