78400555505006 has 8 divisors (see below), whose sum is σ = 134400952294320. Its totient is φ = 33600238073568.

The previous prime is 78400555504991. The next prime is 78400555505023. The reversal of 78400555505006 is 60050555500487.

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

It is a super-3 number, since 3×78400555505006³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 3 ways as a sum of consecutive naturals, for example, 2800019839451 + ... + 2800019839478.

It is an arithmetic number, because the mean of its divisors is an integer number (16800119036790).

Almost surely, 2^{78400555505006} is an apocalyptic number.

78400555505006 is a deficient number, since it is larger than the sum of its proper divisors (56000396789314).

78400555505006 is a wasteful number, since it uses less digits than its factorization.

78400555505006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600039678938.

The product of its (nonzero) digits is 4200000, while the sum is 50.

The spelling of 78400555505006 in words is "seventy-eight trillion, four hundred billion, five hundred fifty-five million, five hundred five thousand, six".