3540664021 has 2 divisors, whose sum is σ = 3540664022. Its totient is φ = 3540664020.

The previous prime is 3540664013. The next prime is 3540664067. The reversal of 3540664021 is 1204660453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2200079025 + 1340584996 = 46905^2 + 36614^2 .

It is an emirp because it is prime and its reverse (1204660453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3540664021 - 2³ = 3540664013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3040664021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770332010 + 1770332011.

It is an arithmetic number, because the mean of its divisors is an integer number (1770332011).

Almost surely, 2^3540664021 is an apocalyptic number.

It is an amenable number.

3540664021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3540664021 is an equidigital number, since it uses as much as digits as its factorization.

3540664021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3540664021 is about 59503.4790663538. The cubic root of 3540664021 is about 1524.1518560376.

The spelling of 3540664021 in words is "three billion, five hundred forty million, six hundred sixty-four thousand, twenty-one".