3621815772 has 24 divisors (see below), whose sum is σ = 8594140800. Its totient is φ = 1186809456.

The previous prime is 3621815767. The next prime is 3621815789. The reversal of 3621815772 is 2775181263.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2557072 + ... + 2558487.

It is an arithmetic number, because the mean of its divisors is an integer number (358089200).

Almost surely, 2^3621815772 is an apocalyptic number.

It is an amenable number.

3621815772 is an abundant number, since it is smaller than the sum of its proper divisors (4972325028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3621815772 is a wasteful number, since it uses less digits than its factorization.

3621815772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5115625 (or 5115623 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 3621815772 is about 60181.5235101273. The cubic root of 3621815772 is about 1535.7084899402.

The spelling of 3621815772 in words is "three billion, six hundred twenty-one million, eight hundred fifteen thousand, seven hundred seventy-two".