621944040960 has 1280 divisors, whose sum is σ = 2536359091200. Its totient is φ = 143061811200.

The previous prime is 621944040947. The next prime is 621944041007. The reversal of 621944040960 is 69040449126.

621944040960 is a `hidden beast` number, since 62 + 1 + 94 + 40 + 409 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (1280).

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, 1477301550 + ... + 1477301970.

It is an arithmetic number, because the mean of its divisors is an integer number (1981530540).

Almost surely, 2^621944040960 is an apocalyptic number.

621944040960 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 621944040960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1268179545600).

621944040960 is an abundant number, since it is smaller than the sum of its proper divisors (1914415050240).

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

621944040960 is a wasteful number, since it uses less digits than its factorization.

621944040960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 621944040960 in words is "six hundred twenty-one billion, nine hundred forty-four million, forty thousand, nine hundred sixty".