78177258445255 has 8 divisors (see below), whose sum is σ = 97047631173600. Its totient is φ = 60385192730016.

The previous prime is 78177258445241. The next prime is 78177258445267. The reversal of 78177258445255 is 55254485277187.

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 78177258445255 - 2¹³ = 78177258437063 is a prime.

It is a super-3 number, since 3×78177258445255³ (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 7 ways as a sum of consecutive naturals, for example, 269576753115 + ... + 269576753404.

It is an arithmetic number, because the mean of its divisors is an integer number (12130953896700).

Almost surely, 2^{78177258445255} is an apocalyptic number.

78177258445255 is a deficient number, since it is larger than the sum of its proper divisors (18870372728345).

78177258445255 is a wasteful number, since it uses less digits than its factorization.

78177258445255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539153506553.

The product of its digits is 878080000, while the sum is 70.

The spelling of 78177258445255 in words is "seventy-eight trillion, one hundred seventy-seven billion, two hundred fifty-eight million, four hundred forty-five thousand, two hundred fifty-five".