646801712 has 10 divisors (see below), whose sum is σ = 1253178348. Its totient is φ = 323400848.

The previous prime is 646801711. The next prime is 646801739. The reversal of 646801712 is 217108646.

It is a super-2 number, since 2×646801712² = 836704909292261888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646801711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20212538 + ... + 20212569.

Almost surely, 2^646801712 is an apocalyptic number.

It is an amenable number.

646801712 is a deficient number, since it is larger than the sum of its proper divisors (606376636).

646801712 is a wasteful number, since it uses less digits than its factorization.

646801712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40425115 (or 40425109 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 646801712 is about 25432.2966324318. The cubic root of 646801712 is about 864.8160086240.

The spelling of 646801712 in words is "six hundred forty-six million, eight hundred one thousand, seven hundred twelve".