78745218279 has 24 divisors (see below), whose sum is σ = 131530477680. Its totient is φ = 41535938304.

The previous prime is 78745218257. The next prime is 78745218283. The reversal of 78745218279 is 97281254787.

It is not a de Polignac number, because 78745218279 - 2⁵ = 78745218247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78745219279) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 20601234 + ... + 20605055.

It is an arithmetic number, because the mean of its divisors is an integer number (5480436570).

Almost surely, 2^78745218279 is an apocalyptic number.

78745218279 is a deficient number, since it is larger than the sum of its proper divisors (52785259401).

78745218279 is a wasteful number, since it uses less digits than its factorization.

78745218279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41206319 (or 41206312 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 60.

The spelling of 78745218279 in words is "seventy-eight billion, seven hundred forty-five million, two hundred eighteen thousand, two hundred seventy-nine".