3632821661 has 8 divisors (see below), whose sum is σ = 4153474944. Its totient is φ = 3112588080.

The previous prime is 3632821657. The next prime is 3632821663. The reversal of 3632821661 is 1661282363.

3632821661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3632821661 - 2² = 3632821657 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 (3632821663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86150 + ... + 121191.

It is an arithmetic number, because the mean of its divisors is an integer number (519184368).

Almost surely, 2^3632821661 is an apocalyptic number.

It is an amenable number.

3632821661 is a deficient number, since it is larger than the sum of its proper divisors (520653283).

3632821661 is a wasteful number, since it uses less digits than its factorization.

3632821661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209851.

The product of its digits is 62208, while the sum is 38.

The square root of 3632821661 is about 60272.8932522739. The cubic root of 3632821661 is about 1537.2624752688.

The spelling of 3632821661 in words is "three billion, six hundred thirty-two million, eight hundred twenty-one thousand, six hundred sixty-one".