11720535659 has 16 divisors (see below), whose sum is σ = 13742034432. Its totient is φ = 9789139008.

The previous prime is 11720535649. The next prime is 11720535679. The reversal of 11720535659 is 95653502711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11720535659 is a prime.

It is a super-2 number, since 2×11720535659² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11720535649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95759 + ... + 180584.

It is an arithmetic number, because the mean of its divisors is an integer number (858877152).

Almost surely, 2^11720535659 is an apocalyptic number.

11720535659 is a deficient number, since it is larger than the sum of its proper divisors (2021498773).

11720535659 is an equidigital number, since it uses as much as digits as its factorization.

11720535659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276506.

The product of its (nonzero) digits is 283500, while the sum is 44.

The spelling of 11720535659 in words is "eleven billion, seven hundred twenty million, five hundred thirty-five thousand, six hundred fifty-nine".