845079061717 has 30 divisors (see below), whose sum is σ = 955469999490. Its totient is φ = 746891608320.

The previous prime is 845079061711. The next prime is 845079061741. The reversal of 845079061717 is 717160970548.

It can be written as a sum of positive squares in 3 ways, for example, as 215216199396 + 629862862321 = 463914^2 + 793639^2 .

It is a de Polignac number, because none of the positive numbers 2^k-845079061717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845079061711) 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 29 ways as a sum of consecutive naturals, for example, 676603909 + ... + 676605157.

It is an arithmetic number, because the mean of its divisors is an integer number (31848999983).

Almost surely, 2^845079061717 is an apocalyptic number.

It is an amenable number.

845079061717 is a deficient number, since it is larger than the sum of its proper divisors (110390937773).

845079061717 is an frugal number, since it uses more digits than its factorization.

845079061717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 845079061717 in words is "eight hundred forty-five billion, seventy-nine million, sixty-one thousand, seven hundred seventeen".