11605656647 has 8 divisors (see below), whose sum is σ = 12505635744. Its totient is φ = 10706711328.

The previous prime is 11605656631. The next prime is 11605656649. The reversal of 11605656647 is 74665650611.

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 11605656647 - 2⁴ = 11605656631 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 (11605656649) 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, 235043 + ... + 280100.

It is an arithmetic number, because the mean of its divisors is an integer number (1563204468).

Almost surely, 2^11605656647 is an apocalyptic number.

11605656647 is a deficient number, since it is larger than the sum of its proper divisors (899979097).

11605656647 is a wasteful number, since it uses less digits than its factorization.

11605656647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516889.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 11605656647 in words is "eleven billion, six hundred five million, six hundred fifty-six thousand, six hundred forty-seven".