646060240064 has 28 divisors (see below), whose sum is σ = 1289702611344. Its totient is φ = 321095802624.

The previous prime is 646060240043. The next prime is 646060240073. The reversal of 646060240064 is 460042060646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30212939 + ... + 30234314.

It is an arithmetic number, because the mean of its divisors is an integer number (46060807548).

Almost surely, 2^646060240064 is an apocalyptic number.

646060240064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

646060240064 is a deficient number, since it is larger than the sum of its proper divisors (643642371280).

646060240064 is a wasteful number, since it uses less digits than its factorization.

646060240064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60447432 (or 60447422 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 646060240064 in words is "six hundred forty-six billion, sixty million, two hundred forty thousand, sixty-four".