621093780720 has 640 divisors, whose sum is σ = 2518053120000. Its totient is φ = 140643578880.

The previous prime is 621093780679. The next prime is 621093780733. The reversal of 621093780720 is 27087390126.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 80752075 + ... + 80759765.

It is an arithmetic number, because the mean of its divisors is an integer number (3934458000).

Almost surely, 2^621093780720 is an apocalyptic number.

621093780720 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 621093780720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259026560000).

621093780720 is an abundant number, since it is smaller than the sum of its proper divisors (1896959339280).

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

621093780720 is a wasteful number, since it uses less digits than its factorization.

621093780720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843 (or 7817 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 621093780720 in words is "six hundred twenty-one billion, ninety-three million, seven hundred eighty thousand, seven hundred twenty".