16778226444 has 24 divisors (see below), whose sum is σ = 44741937408. Its totient is φ = 4793778960.

The previous prime is 16778226407. The next prime is 16778226467. The reversal of 16778226444 is 44462287761.

It is a happy number.

16778226444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16778226444² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99870312 + ... + 99870479.

It is an arithmetic number, because the mean of its divisors is an integer number (1864247392).

Almost surely, 2^16778226444 is an apocalyptic number.

16778226444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16778226444 is an abundant number, since it is smaller than the sum of its proper divisors (27963710964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16778226444 is a wasteful number, since it uses less digits than its factorization.

16778226444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199740805 (or 199740803 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 51.

The spelling of 16778226444 in words is "sixteen billion, seven hundred seventy-eight million, two hundred twenty-six thousand, four hundred forty-four".