1097559018 has 16 divisors (see below), whose sum is σ = 2439020160. Its totient is φ = 365852988.

The previous prime is 1097559017. The next prime is 1097559091. The reversal of 1097559018 is 8109557901.

1097559018 is a `hidden beast` number, since 1 + 0 + 97 + 559 + 0 + 1 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1097559017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10162530 + ... + 10162637.

It is an arithmetic number, because the mean of its divisors is an integer number (152438760).

Almost surely, 2^1097559018 is an apocalyptic number.

1097559018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1097559018 is an abundant number, since it is smaller than the sum of its proper divisors (1341461142).

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

1097559018 is a wasteful number, since it uses less digits than its factorization.

1097559018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20325178 (or 20325172 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 45.

The square root of 1097559018 is about 33129.4282775903. The cubic root of 1097559018 is about 1031.5159811110.

The spelling of 1097559018 in words is "one billion, ninety-seven million, five hundred fifty-nine thousand, eighteen".