78281819182 has 16 divisors (see below), whose sum is σ = 134219036160. Its totient is φ = 33543943128.

The previous prime is 78281819177. The next prime is 78281819197. The reversal of 78281819182 is 28191818287.

It is a happy number.

It is a super-2 number, since 2×78281819182² (a number of 23 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360082 + ... + 534997.

It is an arithmetic number, because the mean of its divisors is an integer number (8388689760).

Almost surely, 2^78281819182 is an apocalyptic number.

78281819182 is a deficient number, since it is larger than the sum of its proper divisors (55937216978).

78281819182 is a wasteful number, since it uses less digits than its factorization.

78281819182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901335.

The product of its digits is 1032192, while the sum is 55.

The spelling of 78281819182 in words is "seventy-eight billion, two hundred eighty-one million, eight hundred nineteen thousand, one hundred eighty-two".