646936161216 has 56 divisors (see below), whose sum is σ = 1713170395344. Its totient is φ = 215458283520.

The previous prime is 646936161211. The next prime is 646936161229. The reversal of 646936161216 is 612161639646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646936161211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239795 + ... + 1682546.

Almost surely, 2^646936161216 is an apocalyptic number.

It is an amenable number.

646936161216 is an abundant number, since it is smaller than the sum of its proper divisors (1066234234128).

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

646936161216 is a wasteful number, since it uses less digits than its factorization.

646936161216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923509 (or 2923499 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The spelling of 646936161216 in words is "six hundred forty-six billion, nine hundred thirty-six million, one hundred sixty-one thousand, two hundred sixteen".