620556446400 has 336 divisors, whose sum is σ = 2337927922560. Its totient is φ = 142519910400.

The previous prime is 620556446383. The next prime is 620556446401. The reversal of 620556446400 is 4644655026.

It is not an unprimeable number, because it can be changed into a prime (620556446401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 693912 + ... + 1312488.

Almost surely, 2^620556446400 is an apocalyptic number.

620556446400 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 620556446400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168963961280).

620556446400 is an abundant number, since it is smaller than the sum of its proper divisors (1717371476160).

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

620556446400 is a wasteful number, since it uses less digits than its factorization.

620556446400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618632 (or 618617 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 620556446400 in words is "six hundred twenty billion, five hundred fifty-six million, four hundred forty-six thousand, four hundred".