621164303156224 has 99 divisors (see below), whose sum is σ = 1298095547926303. Its totient is φ = 297069806815232.

The previous prime is 621164303156213. The next prime is 621164303156251. The reversal of 621164303156224 is 422651303461126.

The square root of 621164303156224 is 24923168.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18343434717 + ... + 18343468579.

Almost surely, 2^{621164303156224} is an apocalyptic number.

621164303156224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

621164303156224 is the 24923168-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621164303156224

621164303156224 is an abundant number, since it is smaller than the sum of its proper divisors (676931244770079).

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

621164303156224 is an frugal number, since it uses more digits than its factorization.

621164303156224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67792 (or 33888 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 621164303156224 in words is "six hundred twenty-one trillion, one hundred sixty-four billion, three hundred three million, one hundred fifty-six thousand, two hundred twenty-four".