646146512 has 40 divisors (see below), whose sum is σ = 1367189280. Its totient is φ = 293386880.

The previous prime is 646146493. The next prime is 646146517. The reversal of 646146512 is 215641646.

It is a super-2 number, since 2×646146512² = 835010629939532288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646146517) 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 in 7 ways as a sum of consecutive naturals, for example, 261539 + ... + 263997.

It is an arithmetic number, because the mean of its divisors is an integer number (34179732).

Almost surely, 2^646146512 is an apocalyptic number.

It is an amenable number.

646146512 is an abundant number, since it is smaller than the sum of its proper divisors (721042768).

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

646146512 is a wasteful number, since it uses less digits than its factorization.

646146512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3965 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 646146512 is about 25419.4121096457. The cubic root of 646146512 is about 864.5238949441.

The spelling of 646146512 in words is "six hundred forty-six million, one hundred forty-six thousand, five hundred twelve".