1090161018 has 20 divisors (see below), whose sum is σ = 2442768570. Its totient is φ = 363386952.

The previous prime is 1090160893. The next prime is 1090161031. The reversal of 1090161018 is 8101610901.

It can be written as a sum of positive squares in only one way, i.e., 1086823089 + 3337929 = 32967^2 + 1827^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1090160982 and 1090161000.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3364533 + ... + 3364856.

Almost surely, 2^1090161018 is an apocalyptic number.

1090161018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1090161018 is an abundant number, since it is smaller than the sum of its proper divisors (1352607552).

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

1090161018 is an equidigital number, since it uses as much as digits as its factorization.

1090161018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729403 (or 6729394 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 1090161018 is about 33017.5864956844. The cubic root of 1090161018 is about 1029.1931400585.

Adding to 1090161018 its reverse (8101610901), we get a palindrome (9191771919).

The spelling of 1090161018 in words is "one billion, ninety million, one hundred sixty-one thousand, eighteen".