3616542421 has 4 divisors (see below), whose sum is σ = 3666084172. Its totient is φ = 3567000672.

The previous prime is 3616542389. The next prime is 3616542431. The reversal of 3616542421 is 1242456163.

3616542421 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 1242456163 = 13 ⋅95573551.

It can be written as a sum of positive squares in 2 ways, for example, as 2852628100 + 763914321 = 53410^2 + 27639^2 .

It is a cyclic number.

It is not a de Polignac number, because 3616542421 - 2⁵ = 3616542389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3616542431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24770766 + ... + 24770911.

It is an arithmetic number, because the mean of its divisors is an integer number (916521043).

Almost surely, 2^3616542421 is an apocalyptic number.

It is an amenable number.

3616542421 is a deficient number, since it is larger than the sum of its proper divisors (49541751).

3616542421 is an equidigital number, since it uses as much as digits as its factorization.

3616542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49541750.

The product of its digits is 34560, while the sum is 34.

The square root of 3616542421 is about 60137.6955078926. The cubic root of 3616542421 is about 1534.9627991989.

Adding to 3616542421 its reverse (1242456163), we get a palindrome (4858998584).

The spelling of 3616542421 in words is "three billion, six hundred sixteen million, five hundred forty-two thousand, four hundred twenty-one".