3549423621 has 16 divisors (see below), whose sum is σ = 4826065536. Its totient is φ = 2319610176.

The previous prime is 3549423617. The next prime is 3549423673. The reversal of 3549423621 is 1263249453.

3549423621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3549423621 - 2² = 3549423617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3549423621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3549423601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185331 + ... + 203583.

It is an arithmetic number, because the mean of its divisors is an integer number (301629096).

Almost surely, 2^3549423621 is an apocalyptic number.

It is an amenable number.

3549423621 is a deficient number, since it is larger than the sum of its proper divisors (1276641915).

3549423621 is a wasteful number, since it uses less digits than its factorization.

3549423621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19532.

The product of its digits is 155520, while the sum is 39.

The square root of 3549423621 is about 59577.0393775992. The cubic root of 3549423621 is about 1525.4077377534.

The spelling of 3549423621 in words is "three billion, five hundred forty-nine million, four hundred twenty-three thousand, six hundred twenty-one".