64421016348820 has 48 divisors (see below), whose sum is σ = 135320007715200. Its totient is φ = 25761574507136.

The previous prime is 64421016348797. The next prime is 64421016348823. The reversal of 64421016348820 is 2884361012446.

64421016348820 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64421016348823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1448194299 + ... + 1448238781.

It is an arithmetic number, because the mean of its divisors is an integer number (2819166827400).

Almost surely, 2^{64421016348820} is an apocalyptic number.

It is an amenable number.

64421016348820 is an abundant number, since it is smaller than the sum of its proper divisors (70898991366380).

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

64421016348820 is a wasteful number, since it uses less digits than its factorization.

64421016348820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62064 (or 62062 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 49.

The spelling of 64421016348820 in words is "sixty-four trillion, four hundred twenty-one billion, sixteen million, three hundred forty-eight thousand, eight hundred twenty".