6538636580420 has 48 divisors (see below), whose sum is σ = 15780396723840. Its totient is φ = 2229294123264.

The previous prime is 6538636580381. The next prime is 6538636580501. The reversal of 6538636580420 is 240856368356.

It is a super-2 number, since 2×6538636580420² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130434569 + ... + 130484688.

It is an arithmetic number, because the mean of its divisors is an integer number (328758265080).

Almost surely, 2^{6538636580420} is an apocalyptic number.

It is an amenable number.

6538636580420 is an abundant number, since it is smaller than the sum of its proper divisors (9241760143420).

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

6538636580420 is a wasteful number, since it uses less digits than its factorization.

6538636580420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260919452 (or 260919450 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 56.

The spelling of 6538636580420 in words is "six trillion, five hundred thirty-eight billion, six hundred thirty-six million, five hundred eighty thousand, four hundred twenty".