646375226 has 16 divisors (see below), whose sum is σ = 1133841984. Its totient is φ = 270575424.

The previous prime is 646375211. The next prime is 646375243. The reversal of 646375226 is 622573646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536255 + ... + 537458.

It is an arithmetic number, because the mean of its divisors is an integer number (70865124).

Almost surely, 2^646375226 is an apocalyptic number.

646375226 is a deficient number, since it is larger than the sum of its proper divisors (487466758).

646375226 is a wasteful number, since it uses less digits than its factorization.

646375226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073765.

The product of its digits is 362880, while the sum is 41.

The square root of 646375226 is about 25423.9105174637. The cubic root of 646375226 is about 864.6258869791.

The spelling of 646375226 in words is "six hundred forty-six million, three hundred seventy-five thousand, two hundred twenty-six".