78946344565 has 8 divisors (see below), whose sum is σ = 103347942048. Its totient is φ = 57415523280.

The previous prime is 78946344551. The next prime is 78946344569. The reversal of 78946344565 is 56544364987.

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

It is not a de Polignac number, because 78946344565 - 2³¹ = 76798860917 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 (78946344569) 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, 717693987 + ... + 717694096.

It is an arithmetic number, because the mean of its divisors is an integer number (12918492756).

Almost surely, 2^78946344565 is an apocalyptic number.

It is an amenable number.

78946344565 is a deficient number, since it is larger than the sum of its proper divisors (24401597483).

78946344565 is a wasteful number, since it uses less digits than its factorization.

78946344565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435388099.

The product of its digits is 87091200, while the sum is 61.

The spelling of 78946344565 in words is "seventy-eight billion, nine hundred forty-six million, three hundred forty-four thousand, five hundred sixty-five".