646163126112 has 96 divisors (see below), whose sum is σ = 1938715817472. Its totient is φ = 184596470784.

The previous prime is 646163126087. The next prime is 646163126131. The reversal of 646163126112 is 211621361646.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

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 15 ways as a sum of consecutive naturals, for example, 6222973 + ... + 6325955.

It is an arithmetic number, because the mean of its divisors is an integer number (20194956432).

Almost surely, 2^646163126112 is an apocalyptic number.

It is an amenable number.

646163126112 is an abundant number, since it is smaller than the sum of its proper divisors (1292552691360).

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

646163126112 is a wasteful number, since it uses less digits than its factorization.

646163126112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112340 (or 112332 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

Adding to 646163126112 its reverse (211621361646), we get a palindrome (857784487758).

The spelling of 646163126112 in words is "six hundred forty-six billion, one hundred sixty-three million, one hundred twenty-six thousand, one hundred twelve".