646934255 has 8 divisors (see below), whose sum is σ = 846895824. Its totient is φ = 470497600.

The previous prime is 646934251. The next prime is 646934261. The reversal of 646934255 is 552439646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646934255 - 2² = 646934251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646934251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5881166 + ... + 5881275.

It is an arithmetic number, because the mean of its divisors is an integer number (105861978).

Almost surely, 2^646934255 is an apocalyptic number.

646934255 is a deficient number, since it is larger than the sum of its proper divisors (199961569).

646934255 is a wasteful number, since it uses less digits than its factorization.

646934255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11762457.

The product of its digits is 777600, while the sum is 44.

The square root of 646934255 is about 25434.9022997927. The cubic root of 646934255 is about 864.8750774635.

The spelling of 646934255 in words is "six hundred forty-six million, nine hundred thirty-four thousand, two hundred fifty-five".