636552216550540 has 48 divisors (see below), whose sum is σ = 1367900262634752. Its totient is φ = 248689802644416.

The previous prime is 636552216550387. The next prime is 636552216550589. The reversal of 636552216550540 is 45055612255636.

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, 7768377 + ... + 36516463.

It is an arithmetic number, because the mean of its divisors is an integer number (28497922138224).

Almost surely, 2^{636552216550540} is an apocalyptic number.

It is an amenable number.

636552216550540 is an abundant number, since it is smaller than the sum of its proper divisors (731348046084212).

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

636552216550540 is a wasteful number, since it uses less digits than its factorization.

636552216550540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28773886 (or 28773884 counting only the distinct ones).

The product of its (nonzero) digits is 32400000, while the sum is 55.

The spelling of 636552216550540 in words is "six hundred thirty-six trillion, five hundred fifty-two billion, two hundred sixteen million, five hundred fifty thousand, five hundred forty".