636049289984 has 72 divisors (see below), whose sum is σ = 1291219066368. Its totient is φ = 312638735360.

The previous prime is 636049289927. The next prime is 636049290017. The reversal of 636049289984 is 489982940636.

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 7 ways as a sum of consecutive naturals, for example, 6256649 + ... + 6357495.

It is an arithmetic number, because the mean of its divisors is an integer number (17933598144).

Almost surely, 2^636049289984 is an apocalyptic number.

636049289984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636049289984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645609533184).

636049289984 is an abundant number, since it is smaller than the sum of its proper divisors (655169776384).

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

636049289984 is a wasteful number, since it uses less digits than its factorization.

636049289984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101281 (or 101267 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 68.

The spelling of 636049289984 in words is "six hundred thirty-six billion, forty-nine million, two hundred eighty-nine thousand, nine hundred eighty-four".