78851643305 has 8 divisors (see below), whose sum is σ = 95540632512. Its totient is φ = 62468874288.

The previous prime is 78851643301. The next prime is 78851643313. The reversal of 78851643305 is 50334615887.

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 78851643305 - 2² = 78851643301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78851643301) 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, 76554479 + ... + 76555508.

It is an arithmetic number, because the mean of its divisors is an integer number (11942579064).

Almost surely, 2^78851643305 is an apocalyptic number.

It is an amenable number.

78851643305 is a deficient number, since it is larger than the sum of its proper divisors (16688989207).

78851643305 is a wasteful number, since it uses less digits than its factorization.

78851643305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153110095.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 78851643305 in words is "seventy-eight billion, eight hundred fifty-one million, six hundred forty-three thousand, three hundred five".