189396736722 has 54 divisors (see below), whose sum is σ = 416848052439. Its totient is φ = 62149352760.

The previous prime is 189396736699. The next prime is 189396736729. The reversal of 189396736722 is 227637693981.

189396736722 is a `hidden beast` number, since 189 + 3 + 96 + 7 + 367 + 2 + 2 = 666.

189396736722 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., 94698368361 + 94698368361 = 307731^2 + 307731^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=307731.

It is a super-2 number, since 2×189396736722² (a number of 23 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 189396736722.

It is not an unprimeable number, because it can be changed into a prime (189396736729) 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, 123707097 + ... + 123708627.

Almost surely, 2^189396736722 is an apocalyptic number.

189396736722 is an abundant number, since it is smaller than the sum of its proper divisors (227451315717).

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

189396736722 is an frugal number, since it uses more digits than its factorization.

189396736722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204 (or 1603 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 189396736722 in words is "one hundred eighty-nine billion, three hundred ninety-six million, seven hundred thirty-six thousand, seven hundred twenty-two".