1518506604729 has 9 divisors (see below), whose sum is σ = 2193403768933. Its totient is φ = 1012335271932.

The previous prime is 1518506604709. The next prime is 1518506604751. The reversal of 1518506604729 is 9274066058151.

It is a happy number.

The square root of 1518506604729 is 1232277.

It is a perfect power (a square), and thus also a powerful number.

1518506604729 is a `hidden beast` number, since 1 + 5 + 1 + 8 + 5 + 0 + 6 + 604 + 7 + 29 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-1518506604729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1518506604709) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3491452 + ... + 3902210.

Almost surely, 2^{1518506604729} is an apocalyptic number.

1518506604729 is the 1232277-th square number.

1518506604729 is the 616139-th centered octagonal number.

It is an amenable number.

1518506604729 is a deficient number, since it is larger than the sum of its proper divisors (674897164204).

1518506604729 is an frugal number, since it uses more digits than its factorization.

1518506604729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821524 (or 410762 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 1518506604729 in words is "one trillion, five hundred eighteen billion, five hundred six million, six hundred four thousand, seven hundred twenty-nine".