78319447282836 has 36 divisors (see below), whose sum is σ = 198031426342932. Its totient is φ = 26098930612224.

The previous prime is 78319447282823. The next prime is 78319447282841. The reversal of 78319447282836 is 63828274491387.

78319447282836 is a `hidden beast` number, since 7 + 8 + 31 + 94 + 472 + 8 + 2 + 8 + 36 = 666.

78319447282836 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12956976176400 + 65362471106436 = 3599580^2 + 8084706^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78319447282836² (a number of 29 digits) contains 22 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 (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314532795 + ... + 314781698.

Almost surely, 2^{78319447282836} is an apocalyptic number.

It is an amenable number.

78319447282836 is an abundant number, since it is smaller than the sum of its proper divisors (119711979060096).

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

78319447282836 is a wasteful number, since it uses less digits than its factorization.

78319447282836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629317960 (or 629317955 counting only the distinct ones).

The product of its digits is 780337152, while the sum is 72.

The spelling of 78319447282836 in words is "seventy-eight trillion, three hundred nineteen billion, four hundred forty-seven million, two hundred eighty-two thousand, eight hundred thirty-six".