78940351760 has 80 divisors (see below), whose sum is σ = 189868800000. Its totient is φ = 30491112960.

The previous prime is 78940351759. The next prime is 78940351829. The reversal of 78940351760 is 6715304987.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 78940351699 and 78940351708.

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, 1113866 + ... + 1182614.

It is an arithmetic number, because the mean of its divisors is an integer number (2373360000).

Almost surely, 2^78940351760 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 78940351760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94934400000).

78940351760 is an abundant number, since it is smaller than the sum of its proper divisors (110928448240).

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

78940351760 is a wasteful number, since it uses less digits than its factorization.

78940351760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69256 (or 69250 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 78940351760 in words is "seventy-eight billion, nine hundred forty million, three hundred fifty-one thousand, seven hundred sixty".