78943506415 has 8 divisors (see below), whose sum is σ = 94733942688. Its totient is φ = 63153648480.

The previous prime is 78943506379. The next prime is 78943506419. The reversal of 78943506415 is 51460534987.

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

It is a de Polignac number, because none of the positive numbers 2^k-78943506415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78943506419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257254 + ... + 473356.

It is an arithmetic number, because the mean of its divisors is an integer number (11841742836).

Almost surely, 2^78943506415 is an apocalyptic number.

78943506415 is a deficient number, since it is larger than the sum of its proper divisors (15790436273).

78943506415 is a wasteful number, since it uses less digits than its factorization.

78943506415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289169.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 78943506415 in words is "seventy-eight billion, nine hundred forty-three million, five hundred six thousand, four hundred fifteen".