1228445654188 has 24 divisors (see below), whose sum is σ = 2257102940400. Its totient is φ = 584191341888.

The previous prime is 1228445654153. The next prime is 1228445654201. The reversal of 1228445654188 is 8814565448221.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79022443 + ... + 79037986.

It is an arithmetic number, because the mean of its divisors is an integer number (94045955850).

Almost surely, 2^{1228445654188} is an apocalyptic number.

It is an amenable number.

1228445654188 is a deficient number, since it is larger than the sum of its proper divisors (1028657286212).

1228445654188 is a wasteful number, since it uses less digits than its factorization.

1228445654188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158060529 (or 158060527 counting only the distinct ones).

The product of its digits is 19660800, while the sum is 58.

The spelling of 1228445654188 in words is "one trillion, two hundred twenty-eight billion, four hundred forty-five million, six hundred fifty-four thousand, one hundred eighty-eight".