621856675 has 12 divisors (see below), whose sum is σ = 841202856. Its totient is φ = 452259200.

The previous prime is 621856661. The next prime is 621856679. The reversal of 621856675 is 576658126.

It is not a de Polignac number, because 621856675 - 2¹⁵ = 621823907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621856679) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1130374 + ... + 1130923.

It is an arithmetic number, because the mean of its divisors is an integer number (70100238).

Almost surely, 2^621856675 is an apocalyptic number.

621856675 is a deficient number, since it is larger than the sum of its proper divisors (219346181).

621856675 is a wasteful number, since it uses less digits than its factorization.

621856675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261318 (or 2261313 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 621856675 is about 24937.0542566679. The cubic root of 621856675 is about 853.5522276620.

The spelling of 621856675 in words is "six hundred twenty-one million, eight hundred fifty-six thousand, six hundred seventy-five".