636055880668 has 96 divisors (see below), whose sum is σ = 1308140064000. Its totient is φ = 267934334976.

The previous prime is 636055880657. The next prime is 636055880683. The reversal of 636055880668 is 866088550636.

It is a super-2 number, since 2×636055880668² (a number of 24 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 4458508 + ... + 4598956.

It is an arithmetic number, because the mean of its divisors is an integer number (13626459000).

Almost surely, 2^636055880668 is an apocalyptic number.

636055880668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

636055880668 is an abundant number, since it is smaller than the sum of its proper divisors (672084183332).

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

636055880668 is a wasteful number, since it uses less digits than its factorization.

636055880668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140639 (or 140637 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 61.

The spelling of 636055880668 in words is "six hundred thirty-six billion, fifty-five million, eight hundred eighty thousand, six hundred sixty-eight".