621605441320 has 192 divisors, whose sum is σ = 1505627222400. Its totient is φ = 230897971200.

The previous prime is 621605441311. The next prime is 621605441389. The reversal of 621605441320 is 23144506126.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

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, 419153299 + ... + 419154781.

It is an arithmetic number, because the mean of its divisors is an integer number (7841808450).

Almost surely, 2^621605441320 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 621605441320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (752813611200).

621605441320 is an abundant number, since it is smaller than the sum of its proper divisors (884021781080).

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

621605441320 is a wasteful number, since it uses less digits than its factorization.

621605441320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 621605441320 its reverse (23144506126), we get a palindrome (644749947446).

The spelling of 621605441320 in words is "six hundred twenty-one billion, six hundred five million, four hundred forty-one thousand, three hundred twenty".