646790059968 has 56 divisors (see below), whose sum is σ = 1842937069008. Its totient is φ = 199012325376.

The previous prime is 646790059931. The next prime is 646790059969. The reversal of 646790059968 is 869950097646.

It is a super-2 number, since 2×646790059968² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646790059969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129562821 + ... + 129567812.

It is an arithmetic number, because the mean of its divisors is an integer number (32909590518).

Almost surely, 2^646790059968 is an apocalyptic number.

It is an amenable number.

646790059968 is an abundant number, since it is smaller than the sum of its proper divisors (1196147009040).

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

646790059968 is a wasteful number, since it uses less digits than its factorization.

646790059968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259130661 (or 259130651 counting only the distinct ones).

The product of its (nonzero) digits is 176359680, while the sum is 69.

The spelling of 646790059968 in words is "six hundred forty-six billion, seven hundred ninety million, fifty-nine thousand, nine hundred sixty-eight".