646255070 has 16 divisors (see below), whose sum is σ = 1169689248. Its totient is φ = 257073120.

The previous prime is 646255067. The next prime is 646255117. The reversal of 646255070 is 70552646.

It is a self number, because there is not a number n which added to its sum of digits gives 646255070.

It is a congruent number.

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, 176714 + ... + 180333.

It is an arithmetic number, because the mean of its divisors is an integer number (73105578).

Almost surely, 2^646255070 is an apocalyptic number.

646255070 is a deficient number, since it is larger than the sum of its proper divisors (523434178).

646255070 is a wasteful number, since it uses less digits than its factorization.

646255070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357235.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 646255070 is about 25421.5473565242. The cubic root of 646255070 is about 864.5723079731.

The spelling of 646255070 in words is "six hundred forty-six million, two hundred fifty-five thousand, seventy".