620555645618704 has 160 divisors (see below), whose sum is σ = 1322324580096000. Its totient is φ = 280980115702272.

The previous prime is 620555645618669. The next prime is 620555645618737. The reversal of 620555645618704 is 407816546555026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1489281337 + ... + 1489697959.

It is an arithmetic number, because the mean of its divisors is an integer number (8264528625600).

Almost surely, 2^{620555645618704} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620555645618704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661162290048000).

620555645618704 is an abundant number, since it is smaller than the sum of its proper divisors (701768934477296).

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

620555645618704 is a wasteful number, since it uses less digits than its factorization.

620555645618704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418365 (or 418359 counting only the distinct ones).

The product of its (nonzero) digits is 241920000, while the sum is 64.

The spelling of 620555645618704 in words is "six hundred twenty trillion, five hundred fifty-five billion, six hundred forty-five million, six hundred eighteen thousand, seven hundred four".