68985229640 has 32 divisors (see below), whose sum is σ = 163386072000. Its totient is φ = 26141770944.

The previous prime is 68985229637. The next prime is 68985229727. The reversal of 68985229640 is 4692258986.

It is a self number, because there is not a number n which added to its sum of digits gives 68985229640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45384260 + ... + 45385779.

It is an arithmetic number, because the mean of its divisors is an integer number (5105814750).

Almost surely, 2^68985229640 is an apocalyptic number.

It is an amenable number.

68985229640 is an abundant number, since it is smaller than the sum of its proper divisors (94400842360).

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

68985229640 is a wasteful number, since it uses less digits than its factorization.

68985229640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90770069 (or 90770065 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 68985229640 in words is "sixty-eight billion, nine hundred eighty-five million, two hundred twenty-nine thousand, six hundred forty".