3443645081 has 4 divisors (see below), whose sum is σ = 3445040052. Its totient is φ = 3442250112.

The previous prime is 3443645057. The next prime is 3443645083. The reversal of 3443645081 is 1805463443.

It is a happy number.

3443645081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1061717056 + 2381928025 = 32584^2 + 48805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3443645081 is a prime.

It is a super-2 number, since 2×3443645081² = 23717382887790993122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3443645083) 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, 693776 + ... + 698721.

It is an arithmetic number, because the mean of its divisors is an integer number (861260013).

Almost surely, 2^3443645081 is an apocalyptic number.

It is an amenable number.

3443645081 is a deficient number, since it is larger than the sum of its proper divisors (1394971).

3443645081 is a wasteful number, since it uses less digits than its factorization.

3443645081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394970.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 3443645081 is about 58682.5790247838. The cubic root of 3443645081 is about 1510.1014625622.

The spelling of 3443645081 in words is "three billion, four hundred forty-three million, six hundred forty-five thousand, eighty-one".