646525412 has 24 divisors (see below), whose sum is σ = 1220518656. Its totient is φ = 297890208.

The previous prime is 646525409. The next prime is 646525421. The reversal of 646525412 is 214525646.

It is a super-3 number, since 3×646525412³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

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, 21323 + ... + 41805.

It is an arithmetic number, because the mean of its divisors is an integer number (50854944).

Almost surely, 2^646525412 is an apocalyptic number.

It is an amenable number.

646525412 is a deficient number, since it is larger than the sum of its proper divisors (573993244).

646525412 is a wasteful number, since it uses less digits than its factorization.

646525412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21107 (or 21105 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 646525412 is about 25426.8639828037. The cubic root of 646525412 is about 864.6928473875.

The spelling of 646525412 in words is "six hundred forty-six million, five hundred twenty-five thousand, four hundred twelve".