78005780500 has 96 divisors (see below), whose sum is σ = 181925452800. Its totient is φ = 29154384000.

The previous prime is 78005780449. The next prime is 78005780519. The reversal of 78005780500 is 508750087.

It is a super-3 number, since 3×78005780500³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 362731 + ... + 536269.

It is an arithmetic number, because the mean of its divisors is an integer number (1895056800).

Almost surely, 2^78005780500 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 78005780500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90962726400).

78005780500 is an abundant number, since it is smaller than the sum of its proper divisors (103919672300).

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

78005780500 is a wasteful number, since it uses less digits than its factorization.

78005780500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173618 (or 173606 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The spelling of 78005780500 in words is "seventy-eight billion, five million, seven hundred eighty thousand, five hundred".