63510552168 has 128 divisors (see below), whose sum is σ = 185812254720. Its totient is φ = 17712576000.

The previous prime is 63510552113. The next prime is 63510552187. The reversal of 63510552168 is 86125501536.

It is a happy number.

It is a Cunningham number, because it is equal to 252013²-1.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3013668 + ... + 3034668.

It is an arithmetic number, because the mean of its divisors is an integer number (1451658240).

Almost surely, 2^63510552168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63510552168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92906127360).

63510552168 is an abundant number, since it is smaller than the sum of its proper divisors (122301702552).

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

63510552168 is a wasteful number, since it uses less digits than its factorization.

63510552168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21447 (or 21443 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 63510552168 in words is "sixty-three billion, five hundred ten million, five hundred fifty-two thousand, one hundred sixty-eight".