78281107278 has 32 divisors (see below), whose sum is σ = 174429089280. Its totient is φ = 23216832960.

The previous prime is 78281107253. The next prime is 78281107337. The reversal of 78281107278 is 87270118287.

It is a super-2 number, since 2×78281107278² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78281107278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12614743 + ... + 12620946.

It is an arithmetic number, because the mean of its divisors is an integer number (5450909040).

Almost surely, 2^78281107278 is an apocalyptic number.

78281107278 is an abundant number, since it is smaller than the sum of its proper divisors (96147982002).

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

78281107278 is a wasteful number, since it uses less digits than its factorization.

78281107278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25235752.

The product of its (nonzero) digits is 702464, while the sum is 51.

The spelling of 78281107278 in words is "seventy-eight billion, two hundred eighty-one million, one hundred seven thousand, two hundred seventy-eight".