11986358165 has 16 divisors (see below), whose sum is σ = 14906820096. Its totient is φ = 9242760000.

The previous prime is 11986358141. The next prime is 11986358179. The reversal of 11986358165 is 56185368911.

It is not a de Polignac number, because 11986358165 - 2²⁸ = 11717922709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115142 + ... + 192951.

It is an arithmetic number, because the mean of its divisors is an integer number (931676256).

Almost surely, 2^11986358165 is an apocalyptic number.

It is an amenable number.

11986358165 is a deficient number, since it is larger than the sum of its proper divisors (2920461931).

11986358165 is a wasteful number, since it uses less digits than its factorization.

11986358165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308380.

The product of its digits is 1555200, while the sum is 53.

The spelling of 11986358165 in words is "eleven billion, nine hundred eighty-six million, three hundred fifty-eight thousand, one hundred sixty-five".