181162772033 has 32 divisors (see below), whose sum is σ = 195293524608. Its totient is φ = 167452185600.

The previous prime is 181162772029. The next prime is 181162772093. The reversal of 181162772033 is 330277261181.

It is a cyclic number.

It is not a de Polignac number, because 181162772033 - 2² = 181162772029 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181162772093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138608966 + ... + 138610272.

It is an arithmetic number, because the mean of its divisors is an integer number (6102922644).

Almost surely, 2^181162772033 is an apocalyptic number.

It is an amenable number.

181162772033 is a deficient number, since it is larger than the sum of its proper divisors (14130752575).

181162772033 is a wasteful number, since it uses less digits than its factorization.

181162772033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 181162772033 in words is "one hundred eighty-one billion, one hundred sixty-two million, seven hundred seventy-two thousand, thirty-three".