11855285605 has 8 divisors (see below), whose sum is σ = 14277703032. Its totient is φ = 9449988288.

The previous prime is 11855285599. The next prime is 11855285609. The reversal of 11855285605 is 50658255811.

It can be written as a sum of positive squares in 4 ways, for example, as 213444 + 11855072161 = 462^2 + 108881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11855285605 - 2⁵ = 11855285573 is a prime.

It is a super-2 number, since 2×11855285605² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11855285609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4278502 + ... + 4281271.

It is an arithmetic number, because the mean of its divisors is an integer number (1784712879).

Almost surely, 2^11855285605 is an apocalyptic number.

It is an amenable number.

11855285605 is a deficient number, since it is larger than the sum of its proper divisors (2422417427).

11855285605 is an equidigital number, since it uses as much as digits as its factorization.

11855285605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560055.

The product of its (nonzero) digits is 480000, while the sum is 46.

The spelling of 11855285605 in words is "eleven billion, eight hundred fifty-five million, two hundred eighty-five thousand, six hundred five".