1228171803444 has 48 divisors (see below), whose sum is σ = 3184218979200. Its totient is φ = 409381619328.

The previous prime is 1228171803433. The next prime is 1228171803461. The reversal of 1228171803444 is 4443081718221.

1228171803444 is a `hidden beast` number, since 1 + 2 + 28 + 1 + 7 + 180 + 3 + 444 = 666.

It is a super-2 number, since 2×1228171803444² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1228171803444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6387097 + ... + 6576575.

It is an arithmetic number, because the mean of its divisors is an integer number (66337895400).

Almost surely, 2^{1228171803444} is an apocalyptic number.

It is an amenable number.

1228171803444 is an abundant number, since it is smaller than the sum of its proper divisors (1956047175756).

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

1228171803444 is a wasteful number, since it uses less digits than its factorization.

1228171803444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249509 (or 249501 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 1228171803444 in words is "one trillion, two hundred twenty-eight billion, one hundred seventy-one million, eight hundred three thousand, four hundred forty-four".