3652591821 has 16 divisors (see below), whose sum is σ = 4916782080. Its totient is φ = 2411814960.

The previous prime is 3652591783. The next prime is 3652591841. The reversal of 3652591821 is 1281952563.

3652591821 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3652591821 - 2⁶ = 3652591757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3652591841) 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, 169566 + ... + 189888.

It is an arithmetic number, because the mean of its divisors is an integer number (307298880).

Almost surely, 2^3652591821 is an apocalyptic number.

It is an amenable number.

3652591821 is a deficient number, since it is larger than the sum of its proper divisors (1264190259).

3652591821 is a wasteful number, since it uses less digits than its factorization.

3652591821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20896.

The product of its digits is 129600, while the sum is 42.

The square root of 3652591821 is about 60436.6761246844. The cubic root of 3652591821 is about 1540.0460745477.

The spelling of 3652591821 in words is "three billion, six hundred fifty-two million, five hundred ninety-one thousand, eight hundred twenty-one".