189628221122 has 6 divisors (see below), whose sum is σ = 284443255443. Its totient is φ = 94813802642.

The previous prime is 189628221089. The next prime is 189628221137. The reversal of 189628221122 is 221122826981.

It can be written as a sum of positive squares in only one way, i.e., 94814110561 + 94814110561 = 307919^2 + 307919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=307919.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 461879 + ... + 769797.

Almost surely, 2^189628221122 is an apocalyptic number.

189628221122 is a deficient number, since it is larger than the sum of its proper divisors (94815034321).

189628221122 is an frugal number, since it uses more digits than its factorization.

189628221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615840 (or 307921 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The spelling of 189628221122 in words is "one hundred eighty-nine billion, six hundred twenty-eight million, two hundred twenty-one thousand, one hundred twenty-two".