12722247605 has 8 divisors (see below), whose sum is σ = 15271190712. Its totient is φ = 10174802368.

The previous prime is 12722247583. The next prime is 12722247607. The reversal of 12722247605 is 50674222721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6764569009 + 5957678596 = 82247^2 + 77186^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12722247605 - 2¹⁶ = 12722182069 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 (12722247607) 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, 355694 + ... + 389823.

It is an arithmetic number, because the mean of its divisors is an integer number (1908898839).

Almost surely, 2^12722247605 is an apocalyptic number.

It is an amenable number.

12722247605 is a deficient number, since it is larger than the sum of its proper divisors (2548943107).

12722247605 is an equidigital number, since it uses as much as digits as its factorization.

12722247605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748935.

The product of its (nonzero) digits is 94080, while the sum is 38.

The spelling of 12722247605 in words is "twelve billion, seven hundred twenty-two million, two hundred forty-seven thousand, six hundred five".