3684638657220 has 48 divisors (see below), whose sum is σ = 10859987624640. Its totient is φ = 930856081536.

The previous prime is 3684638657173. The next prime is 3684638657237. The reversal of 3684638657220 is 227568364863.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1616068447 + ... + 1616070726.

It is an arithmetic number, because the mean of its divisors is an integer number (226249742180).

Almost surely, 2^{3684638657220} is an apocalyptic number.

3684638657220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3684638657220 is an abundant number, since it is smaller than the sum of its proper divisors (7175348967420).

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

3684638657220 is a wasteful number, since it uses less digits than its factorization.

3684638657220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232139204 (or 3232139202 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 60.

The spelling of 3684638657220 in words is "three trillion, six hundred eighty-four billion, six hundred thirty-eight million, six hundred fifty-seven thousand, two hundred twenty".