646061712 has 80 divisors (see below), whose sum is σ = 1763785920. Its totient is φ = 203212800.

The previous prime is 646061687. The next prime is 646061719. The reversal of 646061712 is 217160646.

It is not an unprimeable number, because it can be changed into a prime (646061719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255012 + ... + 257532.

It is an arithmetic number, because the mean of its divisors is an integer number (22047324).

Almost surely, 2^646061712 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 646061712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881892960).

646061712 is an abundant number, since it is smaller than the sum of its proper divisors (1117724208).

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

646061712 is a wasteful number, since it uses less digits than its factorization.

646061712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832 (or 2826 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 646061712 is about 25417.7440383682. The cubic root of 646061712 is about 864.4860733705.

The spelling of 646061712 in words is "six hundred forty-six million, sixty-one thousand, seven hundred twelve".