11656607657 has 8 divisors (see below), whose sum is σ = 12045792000. Its totient is φ = 11272791600.

The previous prime is 11656607653. The next prime is 11656607671. The reversal of 11656607657 is 75670665611.

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 11656607657 - 2² = 11656607653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11656607653) 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, 1337657 + ... + 1346342.

It is an arithmetic number, because the mean of its divisors is an integer number (1505724000).

Almost surely, 2^11656607657 is an apocalyptic number.

It is an amenable number.

11656607657 is a deficient number, since it is larger than the sum of its proper divisors (389184343).

11656607657 is a wasteful number, since it uses less digits than its factorization.

11656607657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684143.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 11656607657 in words is "eleven billion, six hundred fifty-six million, six hundred seven thousand, six hundred fifty-seven".