621656970480 has 640 divisors, whose sum is σ = 2774122444800. Its totient is φ = 124258738176.

The previous prime is 621656970391. The next prime is 621656970521. The reversal of 621656970480 is 84079656126.

621656970480 is a `hidden beast` number, since 6 + 2 + 1 + 6 + 569 + 70 + 4 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 3651412 + ... + 3817868.

It is an arithmetic number, because the mean of its divisors is an integer number (4334566320).

Almost surely, 2^621656970480 is an apocalyptic number.

621656970480 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 621656970480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387061222400).

621656970480 is an abundant number, since it is smaller than the sum of its proper divisors (2152465474320).

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

621656970480 is a wasteful number, since it uses less digits than its factorization.

621656970480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166518 (or 166506 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 621656970480 in words is "six hundred twenty-one billion, six hundred fifty-six million, nine hundred seventy thousand, four hundred eighty".