63613572 has 72 divisors (see below), whose sum is σ = 164719968. Its totient is φ = 19092480.

The previous prime is 63613567. The next prime is 63613573. The reversal of 63613572 is 27531636.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (63613573) 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, 280123 + ... + 280349.

Almost surely, 2^63613572 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 63613572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82359984).

63613572 is an abundant number, since it is smaller than the sum of its proper divisors (101106396).

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

63613572 is a wasteful number, since it uses less digits than its factorization.

63613572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 436 counting only the distinct ones).

The product of its digits is 22680, while the sum is 33.

The square root of 63613572 is about 7975.8116828320. The cubic root of 63613572 is about 399.1933159123.

The spelling of 63613572 in words is "sixty-three million, six hundred thirteen thousand, five hundred seventy-two".