79285728644 has 12 divisors (see below), whose sum is σ = 138802461504. Its totient is φ = 39627882504.

The previous prime is 79285728629. The next prime is 79285728667. The reversal of 79285728644 is 44682758297.

It is a super-2 number, since 2×79285728644² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3733544 + ... + 3754719.

It is an arithmetic number, because the mean of its divisors is an integer number (11566871792).

Almost surely, 2^79285728644 is an apocalyptic number.

It is an amenable number.

79285728644 is a deficient number, since it is larger than the sum of its proper divisors (59516732860).

79285728644 is a wasteful number, since it uses less digits than its factorization.

79285728644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490914 (or 7490912 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 62.

The spelling of 79285728644 in words is "seventy-nine billion, two hundred eighty-five million, seven hundred twenty-eight thousand, six hundred forty-four".