78664444293 has 8 divisors (see below), whose sum is σ = 104887526400. Its totient is φ = 52442162528.

The previous prime is 78664444291. The next prime is 78664444337. The reversal of 78664444293 is 39244446687.

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 78664444293 - 2¹ = 78664444291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78664444291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88873 + ... + 406481.

It is an arithmetic number, because the mean of its divisors is an integer number (13110940800).

Almost surely, 2^78664444293 is an apocalyptic number.

It is an amenable number.

78664444293 is a deficient number, since it is larger than the sum of its proper divisors (26223082107).

78664444293 is a wasteful number, since it uses less digits than its factorization.

78664444293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400171.

The product of its digits is 27869184, while the sum is 57.

The spelling of 78664444293 in words is "seventy-eight billion, six hundred sixty-four million, four hundred forty-four thousand, two hundred ninety-three".