1518118561 has 8 divisors (see below), whose sum is σ = 1522512000. Its totient is φ = 1513732752.

The previous prime is 1518118559. The next prime is 1518118571. The reversal of 1518118561 is 1658118151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1518118561 - 2¹ = 1518118559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1518118561.

It is not an unprimeable number, because it can be changed into a prime (1518118541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758440 + ... + 760438.

It is an arithmetic number, because the mean of its divisors is an integer number (190314000).

Almost surely, 2^1518118561 is an apocalyptic number.

It is an amenable number.

1518118561 is a deficient number, since it is larger than the sum of its proper divisors (4393439).

1518118561 is a wasteful number, since it uses less digits than its factorization.

1518118561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815.

The product of its digits is 9600, while the sum is 37.

The square root of 1518118561 is about 38963.0409619167. The cubic root of 1518118561 is about 1149.3048252203.

The spelling of 1518118561 in words is "one billion, five hundred eighteen million, one hundred eighteen thousand, five hundred sixty-one".