621264216 has 64 divisors (see below), whose sum is σ = 1627200000. Its totient is φ = 197398656.

The previous prime is 621264209. The next prime is 621264221. The reversal of 621264216 is 612462126.

621264216 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49335 + ... + 60633.

It is an arithmetic number, because the mean of its divisors is an integer number (25425000).

Almost surely, 2^621264216 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 621264216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813600000).

621264216 is an abundant number, since it is smaller than the sum of its proper divisors (1005935784).

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

621264216 is a wasteful number, since it uses less digits than its factorization.

621264216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11416 (or 11412 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 621264216 is about 24925.1723364152. The cubic root of 621264216 is about 853.2810744093.

The spelling of 621264216 in words is "six hundred twenty-one million, two hundred sixty-four thousand, two hundred sixteen".