78657221443 has 8 divisors (see below), whose sum is σ = 83318532768. Its totient is φ = 73999734144.

The previous prime is 78657221431. The next prime is 78657221473. The reversal of 78657221443 is 34412275687.

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 78657221443 - 2⁵ = 78657221411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78657221473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913596 + ... + 995977.

It is an arithmetic number, because the mean of its divisors is an integer number (10414816596).

Almost surely, 2^78657221443 is an apocalyptic number.

78657221443 is a deficient number, since it is larger than the sum of its proper divisors (4661311325).

78657221443 is a wasteful number, since it uses less digits than its factorization.

78657221443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912013.

The product of its digits is 2257920, while the sum is 49.

The spelling of 78657221443 in words is "seventy-eight billion, six hundred fifty-seven million, two hundred twenty-one thousand, four hundred forty-three".