3504656521 has 4 divisors (see below), whose sum is σ = 3526979332. Its totient is φ = 3482333712.

The previous prime is 3504656497. The next prime is 3504656527. The reversal of 3504656521 is 1256564053.

3504656521 is digitally balanced in base 3, 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 882090000 + 2622566521 = 29700^2 + 51211^2 .

It is a cyclic number.

It is not a de Polignac number, because 3504656521 - 2¹⁷ = 3504525449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3504656527) 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 3 ways as a sum of consecutive naturals, for example, 11161170 + ... + 11161483.

It is an arithmetic number, because the mean of its divisors is an integer number (881744833).

Almost surely, 2^3504656521 is an apocalyptic number.

It is an amenable number.

3504656521 is a deficient number, since it is larger than the sum of its proper divisors (22322811).

3504656521 is a wasteful number, since it uses less digits than its factorization.

3504656521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22322810.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 3504656521 is about 59200.1395353085. The cubic root of 3504656521 is about 1518.9675180422.

The spelling of 3504656521 in words is "three billion, five hundred four million, six hundred fifty-six thousand, five hundred twenty-one".