646105712 has 20 divisors (see below), whose sum is σ = 1430662896. Its totient is φ = 276902400.

The previous prime is 646105709. The next prime is 646105721. The reversal of 646105712 is 217501646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2884289 + ... + 2884512.

Almost surely, 2^646105712 is an apocalyptic number.

It is an amenable number.

646105712 is an abundant number, since it is smaller than the sum of its proper divisors (784557184).

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

646105712 is a wasteful number, since it uses less digits than its factorization.

646105712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768816 (or 5768810 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 646105712 is about 25418.6095607136. The cubic root of 646105712 is about 864.5056981850.

The spelling of 646105712 in words is "six hundred forty-six million, one hundred five thousand, seven hundred twelve".