78686982144 has 195 divisors, whose sum is σ = 235544466927. Its totient is φ = 26175135744.

The previous prime is 78686982139. The next prime is 78686982161. The reversal of 78686982144 is 44128968687.

The square root of 78686982144 is 280512.

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

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 161574669 + ... + 161575155.

Almost surely, 2^78686982144 is an apocalyptic number.

78686982144 is the 280512-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78686982144

78686982144 is an abundant number, since it is smaller than the sum of its proper divisors (156857484783).

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

78686982144 is an frugal number, since it uses more digits than its factorization.

78686982144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 492 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The spelling of 78686982144 in words is "seventy-eight billion, six hundred eighty-six million, nine hundred eighty-two thousand, one hundred forty-four".