78847278479 has 8 divisors (see below), whose sum is σ = 79965325440. Its totient is φ = 77729440600.

The previous prime is 78847278469. The next prime is 78847278481. The reversal of 78847278479 is 97487274887.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78847278479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78847278469) 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, 806552 + ... + 899010.

It is an arithmetic number, because the mean of its divisors is an integer number (9995665680).

Almost surely, 2^78847278479 is an apocalyptic number.

78847278479 is a deficient number, since it is larger than the sum of its proper divisors (1118046961).

78847278479 is a wasteful number, since it uses less digits than its factorization.

78847278479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104541.

The product of its digits is 354041856, while the sum is 71.

The spelling of 78847278479 in words is "seventy-eight billion, eight hundred forty-seven million, two hundred seventy-eight thousand, four hundred seventy-nine".