621604775858 has 16 divisors (see below), whose sum is σ = 1019786302080. Its totient is φ = 281821278000.

The previous prime is 621604775851. The next prime is 621604775879. The reversal of 621604775858 is 858577406126.

It is a junction number, because it is equal to n+sod(n) for n = 621604775797 and 621604775806.

It is not an unprimeable number, because it can be changed into a prime (621604775851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 36308618 + ... + 36325733.

It is an arithmetic number, because the mean of its divisors is an integer number (63736643880).

Almost surely, 2^621604775858 is an apocalyptic number.

621604775858 is a deficient number, since it is larger than the sum of its proper divisors (398181526222).

621604775858 is a wasteful number, since it uses less digits than its factorization.

621604775858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72634753.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 621604775858 in words is "six hundred twenty-one billion, six hundred four million, seven hundred seventy-five thousand, eight hundred fifty-eight".