79285728643 has 8 divisors (see below), whose sum is σ = 86500382400. Its totient is φ = 72072218280.

The previous prime is 79285728629. The next prime is 79285728667. The reversal of 79285728643 is 34682758297.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79285728643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79285728343) 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, 137505 + ... + 421282.

It is an arithmetic number, because the mean of its divisors is an integer number (10812547800).

Almost surely, 2^79285728643 is an apocalyptic number.

79285728643 is a deficient number, since it is larger than the sum of its proper divisors (7214653757).

79285728643 is a wasteful number, since it uses less digits than its factorization.

79285728643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571697.

The product of its digits is 40642560, while the sum is 61.

The spelling of 79285728643 in words is "seventy-nine billion, two hundred eighty-five million, seven hundred twenty-eight thousand, six hundred forty-three".