11726606646 has 12 divisors (see below), whose sum is σ = 25407647772. Its totient is φ = 3908868876.

The previous prime is 11726606641. The next prime is 11726606687. The reversal of 11726606646 is 64660662711.

11726606646 is a `hidden beast` number, since 1 + 17 + 26 + 606 + 6 + 4 + 6 = 666.

It is a super-2 number, since 2×11726606646² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11726606641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 325739056 + ... + 325739091.

It is an arithmetic number, because the mean of its divisors is an integer number (2117303981).

Almost surely, 2^11726606646 is an apocalyptic number.

11726606646 is an abundant number, since it is smaller than the sum of its proper divisors (13681041126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11726606646 is a wasteful number, since it uses less digits than its factorization.

11726606646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651478155 (or 651478152 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 11726606646 in words is "eleven billion, seven hundred twenty-six million, six hundred six thousand, six hundred forty-six".