3545444421 has 24 divisors (see below), whose sum is σ = 5163139800. Its totient is φ = 2344320000.

The previous prime is 3545444341. The next prime is 3545444423. The reversal of 3545444421 is 1244445453.

3545444421 is a `hidden beast` number, since 3 + 54 + 544 + 44 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1028196 + 3544416225 = 1014^2 + 59535^2 .

It is not a de Polignac number, because 3545444421 - 2¹⁷ = 3545313349 is a prime.

It is a super-2 number, since 2×3545444421² = 25140352284800050482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3545444423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1179921 + ... + 1182921.

It is an arithmetic number, because the mean of its divisors is an integer number (215130825).

Almost surely, 2^3545444421 is an apocalyptic number.

It is an amenable number.

3545444421 is a deficient number, since it is larger than the sum of its proper divisors (1617695379).

3545444421 is a wasteful number, since it uses less digits than its factorization.

3545444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037 (or 4034 counting only the distinct ones).

The product of its digits is 153600, while the sum is 36.

The square root of 3545444421 is about 59543.6345968232. The cubic root of 3545444421 is about 1524.8374881560.

Adding to 3545444421 its reverse (1244445453), we get a palindrome (4789889874).

The spelling of 3545444421 in words is "three billion, five hundred forty-five million, four hundred forty-four thousand, four hundred twenty-one".