78972717178427 has 8 divisors (see below), whose sum is σ = 79313507275200. Its totient is φ = 78632035367040.

The previous prime is 78972717178387. The next prime is 78972717178447. The reversal of 78972717178427 is 72487171727987.

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 78972717178427 - 2¹⁸ = 78972716916283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78972717178447) by changing a digit.

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, 25609427 + ... + 28526972.

It is an arithmetic number, because the mean of its divisors is an integer number (9914188409400).

Almost surely, 2^{78972717178427} is an apocalyptic number.

78972717178427 is a deficient number, since it is larger than the sum of its proper divisors (340790096773).

78972717178427 is a wasteful number, since it uses less digits than its factorization.

78972717178427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54142693.

The product of its digits is 1084253184, while the sum is 77.

The spelling of 78972717178427 in words is "seventy-eight trillion, nine hundred seventy-two billion, seven hundred seventeen million, one hundred seventy-eight thousand, four hundred twenty-seven".