78876722500 has 135 divisors (see below), whose sum is σ = 178097152387. Its totient is φ = 30556480000.

The previous prime is 78876722497. The next prime is 78876722513. The reversal of 78876722500 is 522767887.

The square root of 78876722500 is 280850.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 22 ways, for example, as 41439116356 + 37437606144 = 203566^2 + 193488^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 575742432 + ... + 575742568.

Almost surely, 2^78876722500 is an apocalyptic number.

78876722500 is the 280850-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78876722500

78876722500 is an abundant number, since it is smaller than the sum of its proper divisors (99220429887).

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

78876722500 is an equidigital number, since it uses as much as digits as its factorization.

78876722500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 78876722500 in words is "seventy-eight billion, eight hundred seventy-six million, seven hundred twenty-two thousand, five hundred".