78634924273 has 4 divisors (see below), whose sum is σ = 82053834048. Its totient is φ = 75216014500.

The previous prime is 78634924271. The next prime is 78634924339. The reversal of 78634924273 is 37242943687.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37242943687 = 63149 ⋅589763.

It is not a de Polignac number, because 78634924273 - 2¹ = 78634924271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78634924271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709454853 + ... + 1709454898.

It is an arithmetic number, because the mean of its divisors is an integer number (20513458512).

Almost surely, 2^78634924273 is an apocalyptic number.

It is an amenable number.

78634924273 is a deficient number, since it is larger than the sum of its proper divisors (3418909775).

78634924273 is a wasteful number, since it uses less digits than its factorization.

78634924273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418909774.

The product of its digits is 12192768, while the sum is 55.

The spelling of 78634924273 in words is "seventy-eight billion, six hundred thirty-four million, nine hundred twenty-four thousand, two hundred seventy-three".