63621641655620 has 48 divisors (see below), whose sum is σ = 133648803864576. Its totient is φ = 25440399600000.

The previous prime is 63621641655617. The next prime is 63621641655673. The reversal of 63621641655620 is 2655614612636.

63621641655620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63621641655620² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 960714110 + ... + 960780330.

It is an arithmetic number, because the mean of its divisors is an integer number (2784350080512).

Almost surely, 2^{63621641655620} is an apocalyptic number.

It is an amenable number.

63621641655620 is an abundant number, since it is smaller than the sum of its proper divisors (70027162208956).

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

63621641655620 is a wasteful number, since it uses less digits than its factorization.

63621641655620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81092 (or 81090 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 63621641655620 in words is "sixty-three trillion, six hundred twenty-one billion, six hundred forty-one million, six hundred fifty-five thousand, six hundred twenty".