3521665444 has 24 divisors (see below), whose sum is σ = 6866229888. Its totient is φ = 1566697440.

The previous prime is 3521665387. The next prime is 3521665451. The reversal of 3521665444 is 4445661253.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3521665397 and 3521665406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849399 + ... + 853534.

It is an arithmetic number, because the mean of its divisors is an integer number (286092912).

Almost surely, 2^3521665444 is an apocalyptic number.

It is an amenable number.

3521665444 is a deficient number, since it is larger than the sum of its proper divisors (3344564444).

3521665444 is a wasteful number, since it uses less digits than its factorization.

3521665444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702995 (or 1702993 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 3521665444 is about 59343.6217634212. The cubic root of 3521665444 is about 1521.4208557338.

The spelling of 3521665444 in words is "three billion, five hundred twenty-one million, six hundred sixty-five thousand, four hundred forty-four".