78934184449 has 4 divisors (see below), whose sum is σ = 82366105536. Its totient is φ = 75502263364.

The previous prime is 78934184387. The next prime is 78934184507. The reversal of 78934184449 is 94448143987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78934184449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78934184149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1715960509 + ... + 1715960554.

It is an arithmetic number, because the mean of its divisors is an integer number (20591526384).

Almost surely, 2^78934184449 is an apocalyptic number.

It is an amenable number.

78934184449 is a deficient number, since it is larger than the sum of its proper divisors (3431921087).

78934184449 is a wasteful number, since it uses less digits than its factorization.

78934184449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431921086.

The product of its digits is 27869184, while the sum is 61.

The spelling of 78934184449 in words is "seventy-eight billion, nine hundred thirty-four million, one hundred eighty-four thousand, four hundred forty-nine".