646113444 has 12 divisors (see below), whose sum is σ = 1507598064. Its totient is φ = 215371144.

The previous prime is 646113443. The next prime is 646113467. The reversal of 646113444 is 444311646.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×646113444² = 834925165035082272, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (646113443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26921382 + ... + 26921405.

It is an arithmetic number, because the mean of its divisors is an integer number (125633172).

Almost surely, 2^646113444 is an apocalyptic number.

It is an amenable number.

646113444 is an abundant number, since it is smaller than the sum of its proper divisors (861484620).

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

646113444 is a wasteful number, since it uses less digits than its factorization.

646113444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53842794 (or 53842792 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 646113444 is about 25418.7616535503. The cubic root of 646113444 is about 864.5091467080.

The spelling of 646113444 in words is "six hundred forty-six million, one hundred thirteen thousand, four hundred forty-four".