621951144 has 16 divisors (see below), whose sum is σ = 1554877920. Its totient is φ = 207317040.

The previous prime is 621951101. The next prime is 621951163. The reversal of 621951144 is 441159126.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12957292 + ... + 12957339.

It is an arithmetic number, because the mean of its divisors is an integer number (97179870).

Almost surely, 2^621951144 is an apocalyptic number.

It is an amenable number.

621951144 is an abundant number, since it is smaller than the sum of its proper divisors (932926776).

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

621951144 is a wasteful number, since it uses less digits than its factorization.

621951144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25914640 (or 25914636 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 621951144 is about 24938.9483338813. The cubic root of 621951144 is about 853.5954477725.

The spelling of 621951144 in words is "six hundred twenty-one million, nine hundred fifty-one thousand, one hundred forty-four".