4003658565820 has 48 divisors (see below), whose sum is σ = 8688390990048. Its totient is φ = 1548732729600.

The previous prime is 4003658565793. The next prime is 4003658565947. The reversal of 4003658565820 is 285658563004.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 22959759 + ... + 23133478.

It is an arithmetic number, because the mean of its divisors is an integer number (181008145626).

Almost surely, 2^{4003658565820} is an apocalyptic number.

It is an amenable number.

4003658565820 is an abundant number, since it is smaller than the sum of its proper divisors (4684732424228).

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

4003658565820 is a wasteful number, since it uses less digits than its factorization.

4003658565820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46093390 (or 46093388 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 52.

The spelling of 4003658565820 in words is "four trillion, three billion, six hundred fifty-eight million, five hundred sixty-five thousand, eight hundred twenty".