79086566945 has 4 divisors (see below), whose sum is σ = 94903880340. Its totient is φ = 63269253552.

The previous prime is 79086566903. The next prime is 79086566987. The reversal of 79086566945 is 54966568097.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (79086566903) and next prime (79086566987).

It can be written as a sum of positive squares in 2 ways, for example, as 12980500624 + 66106066321 = 113932^2 + 257111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79086566945 is a prime.

It is a super-2 number, since 2×79086566945² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7908656690 + ... + 7908656699.

It is an arithmetic number, because the mean of its divisors is an integer number (23725970085).

Almost surely, 2^79086566945 is an apocalyptic number.

It is an amenable number.

79086566945 is a deficient number, since it is larger than the sum of its proper divisors (15817313395).

79086566945 is a wasteful number, since it uses less digits than its factorization.

79086566945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15817313394.

The product of its (nonzero) digits is 97977600, while the sum is 65.

The spelling of 79086566945 in words is "seventy-nine billion, eighty-six million, five hundred sixty-six thousand, nine hundred forty-five".