79285728645 has 12 divisors (see below), whose sum is σ = 137428596396. Its totient is φ = 42285721920.

The previous prime is 79285728629. The next prime is 79285728667. The reversal of 79285728645 is 54682758297.

79285728645 is a `hidden beast` number, since 79 + 285 + 7 + 286 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59474040129 + 19811688516 = 243873^2 + 140754^2 .

It is not a de Polignac number, because 79285728645 - 2⁴ = 79285728629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 880952496 + ... + 880952585.

It is an arithmetic number, because the mean of its divisors is an integer number (11452383033).

Almost surely, 2^79285728645 is an apocalyptic number.

It is an amenable number.

79285728645 is a deficient number, since it is larger than the sum of its proper divisors (58142867751).

79285728645 is a wasteful number, since it uses less digits than its factorization.

79285728645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761905092 (or 1761905089 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 79285728645 in words is "seventy-nine billion, two hundred eighty-five million, seven hundred twenty-eight thousand, six hundred forty-five".