3623440315521 has 16 divisors (see below), whose sum is σ = 5240319519680. Its totient is φ = 2213767627200.

The previous prime is 3623440315499. The next prime is 3623440315531. The reversal of 3623440315521 is 1255130443263.

It is not a de Polignac number, because 3623440315521 - 2⁷ = 3623440315393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3623440315521.

It is not an unprimeable number, because it can be changed into a prime (3623440315531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334198630 + ... + 334209471.

It is an arithmetic number, because the mean of its divisors is an integer number (327519969980).

Almost surely, 2^{3623440315521} is an apocalyptic number.

It is an amenable number.

3623440315521 is a deficient number, since it is larger than the sum of its proper divisors (1616879204159).

3623440315521 is a wasteful number, since it uses less digits than its factorization.

3623440315521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668408256.

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 3623440315521 its reverse (1255130443263), we get a palindrome (4878570758784).

The spelling of 3623440315521 in words is "three trillion, six hundred twenty-three billion, four hundred forty million, three hundred fifteen thousand, five hundred twenty-one".