11705399091 has 12 divisors (see below), whose sum is σ = 16953132768. Its totient is φ = 7782675984.

The previous prime is 11705399081. The next prime is 11705399093. The reversal of 11705399091 is 19099350711.

It is a happy number.

11705399091 is a `hidden beast` number, since 1 + 170 + 5 + 399 + 0 + 91 = 666.

It is not a de Polignac number, because 11705399091 - 2⁵ = 11705399059 is a prime.

It is a super-3 number, since 3×11705399091³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11705399093) 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 11 ways as a sum of consecutive naturals, for example, 1740075 + ... + 1746788.

It is an arithmetic number, because the mean of its divisors is an integer number (1412761064).

Almost surely, 2^11705399091 is an apocalyptic number.

11705399091 is a deficient number, since it is larger than the sum of its proper divisors (5247733677).

11705399091 is a wasteful number, since it uses less digits than its factorization.

11705399091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487242 (or 3487239 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 45.

The spelling of 11705399091 in words is "eleven billion, seven hundred five million, three hundred ninety-nine thousand, ninety-one".