63537408 has 216 divisors, whose sum is σ = 210450240. Its totient is φ = 18247680.

The previous prime is 63537401. The next prime is 63537421. The reversal of 63537408 is 80473536.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (63537401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 582858 + ... + 582966.

Almost surely, 2^63537408 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 63537408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105225120).

63537408 is an abundant number, since it is smaller than the sum of its proper divisors (146912832).

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

63537408 is a wasteful number, since it uses less digits than its factorization.

63537408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 63537408 is about 7971.0355663490. The cubic root of 63537408 is about 399.0339353427.

The spelling of 63537408 in words is "sixty-three million, five hundred thirty-seven thousand, four hundred eight".