2145444366 has 16 divisors (see below), whose sum is σ = 4620957264. Its totient is φ = 660136704.

The previous prime is 2145444361. The next prime is 2145444383. The reversal of 2145444366 is 6634445412.

It is a super-2 number, since 2×2145444366² = 9205863055202283912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145444361) by changing a digit.

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, 13752771 + ... + 13752926.

It is an arithmetic number, because the mean of its divisors is an integer number (288809829).

Almost surely, 2^2145444366 is an apocalyptic number.

2145444366 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2145444366 is an abundant number, since it is smaller than the sum of its proper divisors (2475512898).

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

2145444366 is a wasteful number, since it uses less digits than its factorization.

2145444366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27505715.

The product of its digits is 276480, while the sum is 39.

The square root of 2145444366 is about 46318.9417625230. The cubic root of 2145444366 is about 1289.7506410631.

Adding to 2145444366 its reverse (6634445412), we get a palindrome (8779889778).

The spelling of 2145444366 in words is "two billion, one hundred forty-five million, four hundred forty-four thousand, three hundred sixty-six".