1018559494 has 4 divisors (see below), whose sum is σ = 1527839244. Its totient is φ = 509279746.

The previous prime is 1018559449. The next prime is 1018559501. The reversal of 1018559494 is 4949558101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4949558101 = 18013 ⋅274777.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 254639872 + ... + 254639875.

It is an arithmetic number, because the mean of its divisors is an integer number (381959811).

Almost surely, 2^1018559494 is an apocalyptic number.

1018559494 is a deficient number, since it is larger than the sum of its proper divisors (509279750).

1018559494 is an equidigital number, since it uses as much as digits as its factorization.

1018559494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509279749.

The product of its (nonzero) digits is 259200, while the sum is 46.

The square root of 1018559494 is about 31914.8788811739. The cubic root of 1018559494 is about 1006.1486150492.

The spelling of 1018559494 in words is "one billion, eighteen million, five hundred fifty-nine thousand, four hundred ninety-four".