1018521544 has 24 divisors (see below), whose sum is σ = 2028677490. Its totient is φ = 479303168.

The previous prime is 1018521509. The next prime is 1018521587. The reversal of 1018521544 is 4451258101.

It can be written as a sum of positive squares in 3 ways, for example, as 997928100 + 20593444 = 31590^2 + 4538^2 .

It is a super-2 number, since 2×1018521544² = 2074772271184287872, which contains 22 as substring.

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 in 5 ways as a sum of consecutive naturals, for example, 217957 + ... + 222580.

Almost surely, 2^1018521544 is an apocalyptic number.

It is an amenable number.

1018521544 is a deficient number, since it is larger than the sum of its proper divisors (1010155946).

1018521544 is a wasteful number, since it uses less digits than its factorization.

1018521544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440577 (or 440556 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 1018521544 is about 31914.2843253613. The cubic root of 1018521544 is about 1006.1361190309.

Adding to 1018521544 its reverse (4451258101), we get a palindrome (5469779645).

The spelling of 1018521544 in words is "one billion, eighteen million, five hundred twenty-one thousand, five hundred forty-four".