3544006621 has 2 divisors, whose sum is σ = 3544006622. Its totient is φ = 3544006620.

The previous prime is 3544006619. The next prime is 3544006649. The reversal of 3544006621 is 1266004453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3502982596 + 41024025 = 59186^2 + 6405^2 .

It is a cyclic number.

It is not a de Polignac number, because 3544006621 - 2¹ = 3544006619 is a prime.

Together with 3544006619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3544006601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772003310 + 1772003311.

It is an arithmetic number, because the mean of its divisors is an integer number (1772003311).

Almost surely, 2^3544006621 is an apocalyptic number.

It is an amenable number.

3544006621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3544006621 is an equidigital number, since it uses as much as digits as its factorization.

3544006621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 3544006621 is about 59531.5598737342. The cubic root of 3544006621 is about 1524.6313355544.

The spelling of 3544006621 in words is "three billion, five hundred forty-four million, six thousand, six hundred twenty-one".