3553994121616 has 15 divisors (see below), whose sum is σ = 6885878220993. Its totient is φ = 1776993290400.

The previous prime is 3553994121539. The next prime is 3553994121619. The reversal of 3553994121616 is 6161214993553.

The square root of 3553994121616 is 1885204.

It is a perfect power (a square), and thus also a powerful number.

3553994121616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 809272963216 + 2744721158400 = 899596^2 + 1656720^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3553994121619) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7305166 + ... + 7776466.

Almost surely, 2^{3553994121616} is an apocalyptic number.

3553994121616 is the 1885204-th square number.

It is an amenable number.

3553994121616 is a deficient number, since it is larger than the sum of its proper divisors (3331884099377).

3553994121616 is an frugal number, since it uses more digits than its factorization.

3553994121616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942610 (or 471303 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 55.

The spelling of 3553994121616 in words is "three trillion, five hundred fifty-three billion, nine hundred ninety-four million, one hundred twenty-one thousand, six hundred sixteen".