63555552 has 72 divisors (see below), whose sum is σ = 183272544. Its totient is φ = 20888064.

The previous prime is 63555511. The next prime is 63555553. The reversal of 63555552 is 25555536.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63555553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19513 + ... + 22535.

It is an arithmetic number, because the mean of its divisors is an integer number (2545452).

Almost surely, 2^63555552 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 63555552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91636272).

63555552 is an abundant number, since it is smaller than the sum of its proper divisors (119716992).

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

63555552 is a wasteful number, since it uses less digits than its factorization.

63555552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112 (or 3101 counting only the distinct ones).

The product of its digits is 112500, while the sum is 36.

The square root of 63555552 is about 7972.1736057364. The cubic root of 63555552 is about 399.0719149776.

It can be divided in two parts, 6 and 3555552, that multiplied together give a palindrome (21333312).

The spelling of 63555552 in words is "sixty-three million, five hundred fifty-five thousand, five hundred fifty-two".