11809556697 has 8 divisors (see below), whose sum is σ = 16289043840. Its totient is φ = 7601553680.

The previous prime is 11809556687. The next prime is 11809556741. The reversal of 11809556697 is 79665590811.

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 11809556697 - 2⁷ = 11809556569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11809556657) 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, 67870929 + ... + 67871102.

It is an arithmetic number, because the mean of its divisors is an integer number (2036130480).

Almost surely, 2^11809556697 is an apocalyptic number.

It is an amenable number.

11809556697 is a deficient number, since it is larger than the sum of its proper divisors (4479487143).

11809556697 is a wasteful number, since it uses less digits than its factorization.

11809556697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135742063.

The product of its (nonzero) digits is 4082400, while the sum is 57.

The spelling of 11809556697 in words is "eleven billion, eight hundred nine million, five hundred fifty-six thousand, six hundred ninety-seven".