78856755253617 has 8 divisors (see below), whose sum is σ = 114700734914400. Its totient is φ = 47791972880960.

The previous prime is 78856755253613. The next prime is 78856755253637. The reversal of 78856755253617 is 71635255765887.

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

It is not a de Polignac number, because 78856755253617 - 2² = 78856755253613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78856755253613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194799321992 + ... + 1194799322057.

It is an arithmetic number, because the mean of its divisors is an integer number (14337591864300).

Almost surely, 2^{78856755253617} is an apocalyptic number.

It is an amenable number.

78856755253617 is a deficient number, since it is larger than the sum of its proper divisors (35843979660783).

78856755253617 is a wasteful number, since it uses less digits than its factorization.

78856755253617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389598644063.

The product of its digits is 2963520000, while the sum is 75.

The spelling of 78856755253617 in words is "seventy-eight trillion, eight hundred fifty-six billion, seven hundred fifty-five million, two hundred fifty-three thousand, six hundred seventeen".