646907184412 has 12 divisors (see below), whose sum is σ = 1191671129320. Its totient is φ = 306429718896.

The previous prime is 646907184397. The next prime is 646907184467. The reversal of 646907184412 is 214481709646.

It is a happy number.

It is a super-2 number, since 2×646907184412² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646907184412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4255968243 + ... + 4255968394.

Almost surely, 2^646907184412 is an apocalyptic number.

It is an amenable number.

646907184412 is a deficient number, since it is larger than the sum of its proper divisors (544763944908).

646907184412 is a wasteful number, since it uses less digits than its factorization.

646907184412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8511936660 (or 8511936658 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 646907184412 in words is "six hundred forty-six billion, nine hundred seven million, one hundred eighty-four thousand, four hundred twelve".