3637821981804 has 24 divisors (see below), whose sum is σ = 8488312376880. Its totient is φ = 1212598600704.

The previous prime is 3637821981733. The next prime is 3637821981841. The reversal of 3637821981804 is 4081891287363.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773592 + ... + 2806080.

It is an arithmetic number, because the mean of its divisors is an integer number (353679682370).

Almost surely, 2^{3637821981804} is an apocalyptic number.

It is an amenable number.

3637821981804 is an abundant number, since it is smaller than the sum of its proper divisors (4850490395076).

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

3637821981804 is a wasteful number, since it uses less digits than its factorization.

3637821981804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181649 (or 2181647 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 3637821981804 in words is "three trillion, six hundred thirty-seven billion, eight hundred twenty-one million, nine hundred eighty-one thousand, eight hundred four".