63455855855436 has 144 divisors (see below), whose sum is σ = 179917660829088. Its totient is φ = 18688102963200.

The previous prime is 63455855855411. The next prime is 63455855855479.

63455855855436 is a `hidden beast` number, since 6 + 3 + 4 + 5 + 5 + 8 + 5 + 585 + 5 + 4 + 36 = 666.

63455855855436 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10450486 + ... + 15366338.

It is an arithmetic number, because the mean of its divisors is an integer number (1249428200202).

Almost surely, 2^{63455855855436} is an apocalyptic number.

63455855855436 is a gapful number since it is divisible by the number (66) 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 63455855855436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89958830414544).

63455855855436 is an abundant number, since it is smaller than the sum of its proper divisors (116461804973652).

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

63455855855436 is a wasteful number, since it uses less digits than its factorization.

63455855855436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916792 (or 4916787 counting only the distinct ones).

The product of its digits is 5184000000, while the sum is 72.

The spelling of 63455855855436 in words is "sixty-three trillion, four hundred fifty-five billion, eight hundred fifty-five million, eight hundred fifty-five thousand, four hundred thirty-six".