646563112 has 64 divisors (see below), whose sum is σ = 1363113360. Its totient is φ = 285542400.

The previous prime is 646563109. The next prime is 646563121. The reversal of 646563112 is 211365646.

It can be written as a sum of positive squares in 8 ways, for example, as 123343236 + 523219876 = 11106^2 + 22874^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224562 + ... + 227422.

Almost surely, 2^646563112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646563112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681556680).

646563112 is an abundant number, since it is smaller than the sum of its proper divisors (716550248).

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

646563112 is a wasteful number, since it uses less digits than its factorization.

646563112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974 (or 2970 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 646563112 is about 25427.6053139103. The cubic root of 646563112 is about 864.7096542993.

The spelling of 646563112 in words is "six hundred forty-six million, five hundred sixty-three thousand, one hundred twelve".