1518973898 has 24 divisors (see below), whose sum is σ = 2535474564. Its totient is φ = 678438720.

The previous prime is 1518973891. The next prime is 1518973903. The reversal of 1518973898 is 8983798151.

It can be written as a sum of positive squares in 2 ways, for example, as 1508778649 + 10195249 = 38843^2 + 3193^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1518973891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5411 + ... + 55382.

Almost surely, 2^1518973898 is an apocalyptic number.

1518973898 is a deficient number, since it is larger than the sum of its proper divisors (1016500666).

1518973898 is a wasteful number, since it uses less digits than its factorization.

1518973898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60870 (or 60839 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 59.

The square root of 1518973898 is about 38974.0156771149. The cubic root of 1518973898 is about 1149.5206314607.

The spelling of 1518973898 in words is "one billion, five hundred eighteen million, nine hundred seventy-three thousand, eight hundred ninety-eight".