621641124 has 72 divisors (see below), whose sum is σ = 1705733120. Its totient is φ = 189749952.

The previous prime is 621641113. The next prime is 621641147. The reversal of 621641124 is 421146126.

621641124 is a `hidden beast` number, since 6 + 2 + 1 + 641 + 12 + 4 = 666.

621641124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54207 + ... + 64665.

Almost surely, 2^621641124 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 621641124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852866560).

621641124 is an abundant number, since it is smaller than the sum of its proper divisors (1084091996).

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

621641124 is a wasteful number, since it uses less digits than its factorization.

621641124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10609 (or 10604 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 621641124 is about 24932.7319802704. The cubic root of 621641124 is about 853.4535954500.

The spelling of 621641124 in words is "six hundred twenty-one million, six hundred forty-one thousand, one hundred twenty-four".