180789669 has 6 divisors (see below), whose sum is σ = 261140646. Its totient is φ = 120526440.

The previous prime is 180789649. The next prime is 180789677. The reversal of 180789669 is 966987081.

It can be written as a sum of positive squares in only one way, i.e., 162256644 + 18533025 = 12738^2 + 4305^2 .

It is not a de Polignac number, because 180789669 - 2¹² = 180785573 is a prime.

It is a super-2 number, since 2×180789669² = 65369808834259122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180789649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10043862 + ... + 10043879.

It is an arithmetic number, because the mean of its divisors is an integer number (43523441).

Almost surely, 2^180789669 is an apocalyptic number.

It is an amenable number.

180789669 is a deficient number, since it is larger than the sum of its proper divisors (80350977).

180789669 is a wasteful number, since it uses less digits than its factorization.

180789669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20087747 (or 20087744 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 180789669 is about 13445.8048847959. The cubic root of 180789669 is about 565.4460872599.

The spelling of 180789669 in words is "one hundred eighty million, seven hundred eighty-nine thousand, six hundred sixty-nine".