63216575820 has 192 divisors, whose sum is σ = 199456588800. Its totient is φ = 16620940800.

The previous prime is 63216575803. The next prime is 63216575831. The reversal of 63216575820 is 2857561236.

63216575820 is a `hidden beast` number, since 6 + 3 + 2 + 1 + 65 + 7 + 582 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11168151 + ... + 11173809.

It is an arithmetic number, because the mean of its divisors is an integer number (1038836400).

Almost surely, 2^63216575820 is an apocalyptic number.

63216575820 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 63216575820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99728294400).

63216575820 is an abundant number, since it is smaller than the sum of its proper divisors (136240012980).

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

63216575820 is a wasteful number, since it uses less digits than its factorization.

63216575820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965 (or 5957 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 63216575820 in words is "sixty-three billion, two hundred sixteen million, five hundred seventy-five thousand, eight hundred twenty".