11944428855 has 32 divisors (see below), whose sum is σ = 19173439488. Its totient is φ = 6349622400.

The previous prime is 11944428851. The next prime is 11944428883. The reversal of 11944428855 is 55882444911.

It is a happy number.

It is not a de Polignac number, because 11944428855 - 2² = 11944428851 is a prime.

It is a super-2 number, since 2×11944428855² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11944428798 and 11944428807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11944428851) 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 31 ways as a sum of consecutive naturals, for example, 11698245 + ... + 11699265.

It is an arithmetic number, because the mean of its divisors is an integer number (599169984).

Almost surely, 2^11944428855 is an apocalyptic number.

11944428855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11944428855 is a deficient number, since it is larger than the sum of its proper divisors (7229010633).

11944428855 is a wasteful number, since it uses less digits than its factorization.

11944428855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807.

The product of its digits is 1843200, while the sum is 51.

The spelling of 11944428855 in words is "eleven billion, nine hundred forty-four million, four hundred twenty-eight thousand, eight hundred fifty-five".