78423388735 has 8 divisors (see below), whose sum is σ = 94117007376. Its totient is φ = 62732750400.

The previous prime is 78423388697. The next prime is 78423388751. The reversal of 78423388735 is 53788332487.

It is a happy number.

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

It is not a de Polignac number, because 78423388735 - 2⁷ = 78423388607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78423388735.

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, 686769 + ... + 792778.

It is an arithmetic number, because the mean of its divisors is an integer number (11764625922).

Almost surely, 2^78423388735 is an apocalyptic number.

78423388735 is a deficient number, since it is larger than the sum of its proper divisors (15693618641).

78423388735 is a wasteful number, since it uses less digits than its factorization.

78423388735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490153.

The product of its digits is 27095040, while the sum is 58.

The spelling of 78423388735 in words is "seventy-eight billion, four hundred twenty-three million, three hundred eighty-eight thousand, seven hundred thirty-five".