201122577992 has 36 divisors (see below), whose sum is σ = 438692337315. Its totient is φ = 86191585200.

The previous prime is 201122577991. The next prime is 201122578001. The reversal of 201122577992 is 299775221102.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 100561288996 + 100561288996 = 317114^2 + 317114^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=317114.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201122577991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8867867 + ... + 8890517.

Almost surely, 2^201122577992 is an apocalyptic number.

It is an amenable number.

201122577992 is an abundant number, since it is smaller than the sum of its proper divisors (237569759323).

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

201122577992 is an frugal number, since it uses more digits than its factorization.

201122577992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45322 (or 22660 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 47.

The spelling of 201122577992 in words is "two hundred one billion, one hundred twenty-two million, five hundred seventy-seven thousand, nine hundred ninety-two".