621789396480 has 360 divisors, whose sum is σ = 2505016769112. Its totient is φ = 142123032576.

The previous prime is 621789396439. The next prime is 621789396581. The reversal of 621789396480 is 84693987126.

621789396480 is a `hidden beast` number, since 62 + 1 + 7 + 8 + 9 + 3 + 96 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 853579 + ... + 1404341.

Almost surely, 2^621789396480 is an apocalyptic number.

621789396480 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 621789396480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252508384556).

621789396480 is an abundant number, since it is smaller than the sum of its proper divisors (1883227372632).

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

621789396480 is a wasteful number, since it uses less digits than its factorization.

621789396480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550806 (or 550780 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 621789396480 in words is "six hundred twenty-one billion, seven hundred eighty-nine million, three hundred ninety-six thousand, four hundred eighty".