11858165109 has 12 divisors (see below), whose sum is σ = 19575383776. Its totient is φ = 6776094312.

The previous prime is 11858165093. The next prime is 11858165117. The reversal of 11858165109 is 90156185811.

11858165109 is a `hidden beast` number, since 1 + 1 + 8 + 581 + 65 + 1 + 0 + 9 = 666.

It is not a de Polignac number, because 11858165109 - 2⁴ = 11858165093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11858165119) 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, 94112359 + ... + 94112484.

Almost surely, 2^11858165109 is an apocalyptic number.

It is an amenable number.

11858165109 is a deficient number, since it is larger than the sum of its proper divisors (7717218667).

11858165109 is a wasteful number, since it uses less digits than its factorization.

11858165109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188224856 (or 188224853 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 45.

The spelling of 11858165109 in words is "eleven billion, eight hundred fifty-eight million, one hundred sixty-five thousand, one hundred nine".