11609706691 has 16 divisors (see below), whose sum is σ = 13542938208. Its totient is φ = 9835072000.

The previous prime is 11609706683. The next prime is 11609706791. The reversal of 11609706691 is 19660790611.

It is a cyclic number.

It is not a de Polignac number, because 11609706691 - 2³ = 11609706683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11609706631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288460 + ... + 326233.

It is an arithmetic number, because the mean of its divisors is an integer number (846433638).

Almost surely, 2^11609706691 is an apocalyptic number.

11609706691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11609706691 is a deficient number, since it is larger than the sum of its proper divisors (1933231517).

11609706691 is a wasteful number, since it uses less digits than its factorization.

11609706691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614822.

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 11609706691 in words is "eleven billion, six hundred nine million, seven hundred six thousand, six hundred ninety-one".