78123367247 has 8 divisors (see below), whose sum is σ = 82733914512. Its totient is φ = 73514492800.

The previous prime is 78123367229. The next prime is 78123367291. The reversal of 78123367247 is 74276332187.

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 78123367247 - 2²⁶ = 78056258383 is a prime.

It is a super-2 number, since 2×78123367247² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78123367195 and 78123367204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78123363247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321404 + ... + 509457.

It is an arithmetic number, because the mean of its divisors is an integer number (10341739314).

Almost surely, 2^78123367247 is an apocalyptic number.

78123367247 is a deficient number, since it is larger than the sum of its proper divisors (4610547265).

78123367247 is a wasteful number, since it uses less digits than its factorization.

78123367247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836409.

The product of its digits is 2370816, while the sum is 50.

The spelling of 78123367247 in words is "seventy-eight billion, one hundred twenty-three million, three hundred sixty-seven thousand, two hundred forty-seven".