11171858709 has 32 divisors (see below), whose sum is σ = 16825356288. Its totient is φ = 6532416000.

The previous prime is 11171858693. The next prime is 11171858713. The reversal of 11171858709 is 90785817111.

It is not a de Polignac number, because 11171858709 - 2⁴ = 11171858693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11171858749) 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, 322117 + ... + 355109.

It is an arithmetic number, because the mean of its divisors is an integer number (525792384).

Almost surely, 2^11171858709 is an apocalyptic number.

It is an amenable number.

11171858709 is a deficient number, since it is larger than the sum of its proper divisors (5653497579).

11171858709 is a wasteful number, since it uses less digits than its factorization.

11171858709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33369.

The product of its (nonzero) digits is 141120, while the sum is 48.

The spelling of 11171858709 in words is "eleven billion, one hundred seventy-one million, eight hundred fifty-eight thousand, seven hundred nine".