63553620 has 96 divisors (see below), whose sum is σ = 195027840. Its totient is φ = 15367680.

The previous prime is 63553603. The next prime is 63553631. The reversal of 63553620 is 2635536.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45330 + ... + 46710.

It is an arithmetic number, because the mean of its divisors is an integer number (2031540).

Almost surely, 2^63553620 is an apocalyptic number.

63553620 is a gapful number since it is divisible by the number (60) 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 63553620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97513920).

63553620 is an abundant number, since it is smaller than the sum of its proper divisors (131474220).

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

63553620 is a wasteful number, since it uses less digits than its factorization.

63553620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 63553620 is about 7972.0524333449. The cubic root of 63553620 is about 399.0678711937.

The spelling of 63553620 in words is "sixty-three million, five hundred fifty-three thousand, six hundred twenty".