646426100 has 18 divisors (see below), whose sum is σ = 1402744854. Its totient is φ = 258570400.

The previous prime is 646426073. The next prime is 646426127. The reversal of 646426100 is 1624646.

646426100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (646426073) and next prime (646426127).

It can be written as a sum of positive squares in 3 ways, for example, as 35545444 + 610880656 = 5962^2 + 24716^2 .

It is a super-2 number, since 2×646426100² = 835733405522420000, which contains 22 as substring.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 3232031 + ... + 3232230.

Almost surely, 2^646426100 is an apocalyptic number.

It is an amenable number.

646426100 is an abundant number, since it is smaller than the sum of its proper divisors (756318754).

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

646426100 is a wasteful number, since it uses less digits than its factorization.

646426100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464275 (or 6464268 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 646426100 is about 25424.9110126270. The cubic root of 646426100 is about 864.6485703069.

The spelling of 646426100 in words is "six hundred forty-six million, four hundred twenty-six thousand, one hundred".