1091093002018 has 4 divisors (see below), whose sum is σ = 1636639503030. Its totient is φ = 545546501008.

The previous prime is 1091093001953. The next prime is 1091093002031. The reversal of 1091093002018 is 8102003901901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 975715255089 + 115377746929 = 987783^2 + 339673^2 .

It is a super-3 number, since 3×1091093002018³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272773250503 + ... + 272773250506.

Almost surely, 2^{1091093002018} is an apocalyptic number.

1091093002018 is a deficient number, since it is larger than the sum of its proper divisors (545546501012).

1091093002018 is an equidigital number, since it uses as much as digits as its factorization.

1091093002018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545546501011.

The product of its (nonzero) digits is 3888, while the sum is 34.

Adding to 1091093002018 its reverse (8102003901901), we get a palindrome (9193096903919).

The spelling of 1091093002018 in words is "one trillion, ninety-one billion, ninety-three million, two thousand, eighteen".