646235406312 has 64 divisors (see below), whose sum is σ = 1706858092800. Its totient is φ = 203558611200.

The previous prime is 646235406277. The next prime is 646235406337. The reversal of 646235406312 is 213604532646.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9844939 + ... + 9910362.

It is an arithmetic number, because the mean of its divisors is an integer number (26669657700).

Almost surely, 2^646235406312 is an apocalyptic number.

It is an amenable number.

646235406312 is an abundant number, since it is smaller than the sum of its proper divisors (1060622686488).

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

646235406312 is a wasteful number, since it uses less digits than its factorization.

646235406312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19755386 (or 19755382 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

Adding to 646235406312 its reverse (213604532646), we get a palindrome (859839938958).

The spelling of 646235406312 in words is "six hundred forty-six billion, two hundred thirty-five million, four hundred six thousand, three hundred twelve".