78842231408845 has 8 divisors (see below), whose sum is σ = 96395784817176. Its totient is φ = 61883713709376.

The previous prime is 78842231408833. The next prime is 78842231408861. The reversal of 78842231408845 is 54880413224887.

It can be written as a sum of positive squares in 4 ways, for example, as 39090480008644 + 39751751400201 = 6252238^2 + 6304899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78842231408845 - 2²⁹ = 78841694537933 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 148758926922 + ... + 148758927451.

It is an arithmetic number, because the mean of its divisors is an integer number (12049473102147).

Almost surely, 2^{78842231408845} is an apocalyptic number.

It is an amenable number.

78842231408845 is a deficient number, since it is larger than the sum of its proper divisors (17553553408331).

78842231408845 is a wasteful number, since it uses less digits than its factorization.

78842231408845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297517854431.

The product of its (nonzero) digits is 110100480, while the sum is 64.

The spelling of 78842231408845 in words is "seventy-eight trillion, eight hundred forty-two billion, two hundred thirty-one million, four hundred eight thousand, eight hundred forty-five".