81178003255 has 8 divisors (see below), whose sum is σ = 97417940400. Its totient is φ = 64939511616.

The previous prime is 81178003241. The next prime is 81178003331. The reversal of 81178003255 is 55230087118.

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 81178003255 - 2¹⁷ = 81177872183 is a prime.

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, 233725 + ... + 465814.

It is an arithmetic number, because the mean of its divisors is an integer number (12177242550).

Almost surely, 2^81178003255 is an apocalyptic number.

81178003255 is a deficient number, since it is larger than the sum of its proper divisors (16239937145).

81178003255 is a wasteful number, since it uses less digits than its factorization.

81178003255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722753.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 81178003255 in words is "eighty-one billion, one hundred seventy-eight million, three thousand, two hundred fifty-five".