3440645521 has 16 divisors (see below), whose sum is σ = 3772818000. Its totient is φ = 3123140608.

The previous prime is 3440645479. The next prime is 3440645543. The reversal of 3440645521 is 1255460443.

It can be written as a sum of positive squares in 8 ways, for example, as 23658496 + 3416987025 = 4864^2 + 58455^2 .

It is a cyclic number.

It is not a de Polignac number, because 3440645521 - 2⁹ = 3440645009 is a prime.

It is a super-2 number, since 2×3440645521² = 23676083202354722882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3440645321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513831 + ... + 520483.

It is an arithmetic number, because the mean of its divisors is an integer number (235801125).

Almost surely, 2^3440645521 is an apocalyptic number.

It is an amenable number.

3440645521 is a deficient number, since it is larger than the sum of its proper divisors (332172479).

3440645521 is a wasteful number, since it uses less digits than its factorization.

3440645521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7748.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 3440645521 is about 58657.0159571726. The cubic root of 3440645521 is about 1509.6628811906.

The spelling of 3440645521 in words is "three billion, four hundred forty million, six hundred forty-five thousand, five hundred twenty-one".