11601656605 has 32 divisors (see below), whose sum is σ = 17364695040. Its totient is φ = 7229113920.

The previous prime is 11601656543. The next prime is 11601656609. The reversal of 11601656605 is 50665610611.

It is not a de Polignac number, because 11601656605 - 2⁹ = 11601656093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11601656609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1180522 + ... + 1190308.

It is an arithmetic number, because the mean of its divisors is an integer number (542646720).

Almost surely, 2^11601656605 is an apocalyptic number.

It is an amenable number.

11601656605 is a deficient number, since it is larger than the sum of its proper divisors (5763038435).

11601656605 is a wasteful number, since it uses less digits than its factorization.

11601656605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12889.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 11601656605 in words is "eleven billion, six hundred one million, six hundred fifty-six thousand, six hundred five".