180890432978 has 32 divisors (see below), whose sum is σ = 277086813120. Its totient is φ = 88541556480.

The previous prime is 180890432963. The next prime is 180890433011. The reversal of 180890432978 is 879234098081.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54697601 + ... + 54700907.

It is an arithmetic number, because the mean of its divisors is an integer number (8658962910).

Almost surely, 2^180890432978 is an apocalyptic number.

180890432978 is a deficient number, since it is larger than the sum of its proper divisors (96196380142).

180890432978 is a wasteful number, since it uses less digits than its factorization.

180890432978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5162.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 180890432978 in words is "one hundred eighty billion, eight hundred ninety million, four hundred thirty-two thousand, nine hundred seventy-eight".