78520502080 has 112 divisors (see below), whose sum is σ = 193920739920. Its totient is φ = 30247354368.

The previous prime is 78520502063. The next prime is 78520502119. The reversal of 78520502080 is 8020502587.

It can be written as a sum of positive squares in 8 ways, for example, as 706283776 + 77814218304 = 26576^2 + 278952^2 .

It is a congruent number.

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, 3673504 + ... + 3694816.

Almost surely, 2^78520502080 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 78520502080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96960369960).

78520502080 is an abundant number, since it is smaller than the sum of its proper divisors (115400237840).

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

78520502080 is a wasteful number, since it uses less digits than its factorization.

78520502080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21756 (or 21746 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 78520502080 in words is "seventy-eight billion, five hundred twenty million, five hundred two thousand, eighty".