144168666820 has 12 divisors (see below), whose sum is σ = 302754200364. Its totient is φ = 57667466720.

The previous prime is 144168666809. The next prime is 144168666841. The reversal of 144168666820 is 28666861441.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 87406557316 + 56762109504 = 295646^2 + 238248^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3604216651 + ... + 3604216690.

It is an arithmetic number, because the mean of its divisors is an integer number (25229516697).

Almost surely, 2^144168666820 is an apocalyptic number.

144168666820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144168666820 is an abundant number, since it is smaller than the sum of its proper divisors (158585533544).

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

144168666820 is a wasteful number, since it uses less digits than its factorization.

144168666820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7208433350 (or 7208433348 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 144168666820 in words is "one hundred forty-four billion, one hundred sixty-eight million, six hundred sixty-six thousand, eight hundred twenty".