68840428908040 has 64 divisors (see below), whose sum is σ = 155127076776000. Its totient is φ = 27494224193280.

The previous prime is 68840428908011. The next prime is 68840428908061. The reversal of 68840428908040 is 4080982404886.

68840428908040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 68840428908040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78369591 + ... + 79243129.

It is an arithmetic number, because the mean of its divisors is an integer number (2423860574625).

Almost surely, 2^{68840428908040} is an apocalyptic number.

It is an amenable number.

68840428908040 is an abundant number, since it is smaller than the sum of its proper divisors (86286647867960).

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

68840428908040 is a wasteful number, since it uses less digits than its factorization.

68840428908040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876550 (or 876546 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 61.

The spelling of 68840428908040 in words is "sixty-eight trillion, eight hundred forty billion, four hundred twenty-eight million, nine hundred eight thousand, forty".