3545959621 has 2 divisors, whose sum is σ = 3545959622. Its totient is φ = 3545959620.

The previous prime is 3545959619. The next prime is 3545959633. The reversal of 3545959621 is 1269595453.

3545959621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3161250625 + 384708996 = 56225^2 + 19614^2 .

It is a cyclic number.

It is not a de Polignac number, because 3545959621 - 2¹ = 3545959619 is a prime.

Together with 3545959619, 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 (3545959691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772979810 + 1772979811.

It is an arithmetic number, because the mean of its divisors is an integer number (1772979811).

Almost surely, 2^3545959621 is an apocalyptic number.

It is an amenable number.

3545959621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3545959621 is an equidigital number, since it uses as much as digits as its factorization.

3545959621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458000, while the sum is 49.

The square root of 3545959621 is about 59547.9606787672. The cubic root of 3545959621 is about 1524.9113442683.

The spelling of 3545959621 in words is "three billion, five hundred forty-five million, nine hundred fifty-nine thousand, six hundred twenty-one".