3604571821 has 4 divisors (see below), whose sum is σ = 3607382592. Its totient is φ = 3601761052.

The previous prime is 3604571819. The next prime is 3604571899. The reversal of 3604571821 is 1281754063.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3604571821 - 2¹ = 3604571819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3604571521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403461 + ... + 1406026.

It is an arithmetic number, because the mean of its divisors is an integer number (901845648).

Almost surely, 2^3604571821 is an apocalyptic number.

It is an amenable number.

3604571821 is a deficient number, since it is larger than the sum of its proper divisors (2810771).

3604571821 is a wasteful number, since it uses less digits than its factorization.

3604571821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810770.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 3604571821 is about 60038.0864202050. The cubic root of 3604571821 is about 1533.2673735909.

The spelling of 3604571821 in words is "three billion, six hundred four million, five hundred seventy-one thousand, eight hundred twenty-one".