3621660821420 has 24 divisors (see below), whose sum is σ = 7619142124944. Its totient is φ = 1446063490496.

The previous prime is 3621660821413. The next prime is 3621660821453. The reversal of 3621660821420 is 241280661263.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162540962 + ... + 162563241.

It is an arithmetic number, because the mean of its divisors is an integer number (317464255206).

Almost surely, 2^{3621660821420} is an apocalyptic number.

It is an amenable number.

3621660821420 is an abundant number, since it is smaller than the sum of its proper divisors (3997481303524).

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

3621660821420 is a wasteful number, since it uses less digits than its factorization.

3621660821420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325104769 (or 325104767 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 3621660821420 in words is "three trillion, six hundred twenty-one billion, six hundred sixty million, eight hundred twenty-one thousand, four hundred twenty".