78472338784555 has 8 divisors (see below), whose sum is σ = 94885637126544. Its totient is φ = 62298650637600.

The previous prime is 78472338784549. The next prime is 78472338784639. The reversal of 78472338784555 is 55548783327487.

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

It is not a de Polignac number, because 78472338784555 - 2³ = 78472338784547 is a prime.

It is a Duffinian 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, 59902548036 + ... + 59902549345.

It is an arithmetic number, because the mean of its divisors is an integer number (11860704640818).

Almost surely, 2^{78472338784555} is an apocalyptic number.

78472338784555 is a deficient number, since it is larger than the sum of its proper divisors (16413298341989).

78472338784555 is a wasteful number, since it uses less digits than its factorization.

78472338784555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119805097517.

The product of its digits is 6322176000, while the sum is 76.

The spelling of 78472338784555 in words is "seventy-eight trillion, four hundred seventy-two billion, three hundred thirty-eight million, seven hundred eighty-four thousand, five hundred fifty-five".