889561905122 has 54 divisors (see below), whose sum is σ = 1548415823787. Its totient is φ = 382944889800.

The previous prime is 889561905119. The next prime is 889561905143. The reversal of 889561905122 is 221509165988.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 444780952561 + 444780952561 = 666919^2 + 666919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=666919.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 278770547 + ... + 278773737.

Almost surely, 2^889561905122 is an apocalyptic number.

889561905122 is a deficient number, since it is larger than the sum of its proper divisors (658853918665).

889561905122 is an equidigital number, since it uses as much as digits as its factorization.

889561905122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 3223 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 56.

The spelling of 889561905122 in words is "eight hundred eighty-nine billion, five hundred sixty-one million, nine hundred five thousand, one hundred twenty-two".