63618220620 has 72 divisors (see below), whose sum is σ = 193297759200. Its totient is φ = 16936508160.

The previous prime is 63618220609. The next prime is 63618220651. The reversal of 63618220620 is 2602281636.

63618220620 is a `hidden beast` number, since 6 + 3 + 6 + 1 + 8 + 2 + 20 + 620 = 666.

63618220620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187201 + ... + 402840.

It is an arithmetic number, because the mean of its divisors is an integer number (2684691100).

Almost surely, 2^63618220620 is an apocalyptic number.

63618220620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63618220620 is an abundant number, since it is smaller than the sum of its proper divisors (129679538580).

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

63618220620 is a wasteful number, since it uses less digits than its factorization.

63618220620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590655 (or 590650 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 63618220620 in words is "sixty-three billion, six hundred eighteen million, two hundred twenty thousand, six hundred twenty".