18135756568 has 16 divisors (see below), whose sum is σ = 34025807160. Its totient is φ = 9062208000.

The previous prime is 18135756539. The next prime is 18135756577. The reversal of 18135756568 is 86565753181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695178 + ... + 720793.

Almost surely, 2^18135756568 is an apocalyptic number.

It is an amenable number.

18135756568 is a deficient number, since it is larger than the sum of its proper divisors (15890050592).

18135756568 is a wasteful number, since it uses less digits than its factorization.

18135756568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417578 (or 1417574 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 55.

The spelling of 18135756568 in words is "eighteen billion, one hundred thirty-five million, seven hundred fifty-six thousand, five hundred sixty-eight".