11955888855 has 24 divisors (see below), whose sum is σ = 20785061232. Its totient is φ = 6357544704.

The previous prime is 11955888829. The next prime is 11955888887. The reversal of 11955888855 is 55888855911.

It is not a de Polignac number, because 11955888855 - 2¹⁴ = 11955872471 is a prime.

It is a super-2 number, since 2×11955888855² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11955888792 and 11955888801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 379029 + ... + 409358.

It is an arithmetic number, because the mean of its divisors is an integer number (866044218).

Almost surely, 2^11955888855 is an apocalyptic number.

11955888855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11955888855 is a deficient number, since it is larger than the sum of its proper divisors (8829172377).

11955888855 is a wasteful number, since it uses less digits than its factorization.

11955888855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788735 (or 788732 counting only the distinct ones).

The product of its digits is 23040000, while the sum is 63.

The spelling of 11955888855 in words is "eleven billion, nine hundred fifty-five million, eight hundred eighty-eight thousand, eight hundred fifty-five".