912668801609 has 4 divisors (see below), whose sum is σ = 912774577860. Its totient is φ = 912563025360.

The previous prime is 912668801591. The next prime is 912668801621. The reversal of 912668801609 is 906108866219.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906108866219 = 3251 ⋅278716969.

It can be written as a sum of positive squares in 2 ways, for example, as 687829716025 + 224839085584 = 829355^2 + 474172^2 .

It is a cyclic number.

It is not a de Polignac number, because 912668801609 - 2¹⁶ = 912668736073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (912668801689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52875182 + ... + 52892439.

It is an arithmetic number, because the mean of its divisors is an integer number (228193644465).

Almost surely, 2^912668801609 is an apocalyptic number.

It is an amenable number.

912668801609 is a deficient number, since it is larger than the sum of its proper divisors (105776251).

912668801609 is a wasteful number, since it uses less digits than its factorization.

912668801609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105776250.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 912668801609 in words is "nine hundred twelve billion, six hundred sixty-eight million, eight hundred one thousand, six hundred nine".