3520844651521 has 16 divisors (see below), whose sum is σ = 3748953673728. Its totient is φ = 3295082752000.

The previous prime is 3520844651449. The next prime is 3520844651531. The reversal of 3520844651521 is 1251564480253.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3520844651521 - 2¹⁷ = 3520844520449 is a prime.

It is a super-2 number, since 2×3520844651521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3520844651531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8043921 + ... + 8470321.

It is an arithmetic number, because the mean of its divisors is an integer number (234309604608).

Almost surely, 2^{3520844651521} is an apocalyptic number.

It is an amenable number.

3520844651521 is a deficient number, since it is larger than the sum of its proper divisors (228109022207).

3520844651521 is a wasteful number, since it uses less digits than its factorization.

3520844651521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429152.

The product of its (nonzero) digits is 1152000, while the sum is 46.

The spelling of 3520844651521 in words is "three trillion, five hundred twenty billion, eight hundred forty-four million, six hundred fifty-one thousand, five hundred twenty-one".