68411768840 has 64 divisors (see below), whose sum is σ = 157848912000. Its totient is φ = 26676052480.

The previous prime is 68411768839. The next prime is 68411768869. The reversal of 68411768840 is 4886711486.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117431 + ... + 388089.

It is an arithmetic number, because the mean of its divisors is an integer number (2466389250).

Almost surely, 2^68411768840 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 68411768840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78924456000).

68411768840 is an abundant number, since it is smaller than the sum of its proper divisors (89437143160).

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

68411768840 is a wasteful number, since it uses less digits than its factorization.

68411768840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270830 (or 270826 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 68411768840 in words is "sixty-eight billion, four hundred eleven million, seven hundred sixty-eight thousand, eight hundred forty".