212295189618 has 54 divisors (see below), whose sum is σ = 462995524719. Its totient is φ = 70303074552.

The previous prime is 212295189611. The next prime is 212295189629. The reversal of 212295189618 is 816981592212.

212295189618 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 9 + 5 + 18 + 9 + 618 = 666.

212295189618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 106147594809 + 106147594809 = 325803^2 + 325803^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=325803.

It is not an unprimeable number, because it can be changed into a prime (212295189611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 435924171 + ... + 435924657.

Almost surely, 2^212295189618 is an apocalyptic number.

212295189618 is an abundant number, since it is smaller than the sum of its proper divisors (250700335101).

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

212295189618 is an frugal number, since it uses more digits than its factorization.

212295189618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428 (or 715 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 212295189618 in words is "two hundred twelve billion, two hundred ninety-five million, one hundred eighty-nine thousand, six hundred eighteen".