621043652 has 24 divisors (see below), whose sum is σ = 1146059040. Its totient is φ = 293656320.

The previous prime is 621043637. The next prime is 621043663. The reversal of 621043652 is 256340126.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37652 + ... + 51572.

It is an arithmetic number, because the mean of its divisors is an integer number (47752460).

Almost surely, 2^621043652 is an apocalyptic number.

It is an amenable number.

621043652 is a deficient number, since it is larger than the sum of its proper divisors (525015388).

621043652 is a wasteful number, since it uses less digits than its factorization.

621043652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14531 (or 14529 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 621043652 is about 24920.7474205731. The cubic root of 621043652 is about 853.1800839028.

Adding to 621043652 its reverse (256340126), we get a palindrome (877383778).

It can be divided in two parts, 62104 and 3652, that added together give a palindrome (65756).

The spelling of 621043652 in words is "six hundred twenty-one million, forty-three thousand, six hundred fifty-two".