18768678545 has 8 divisors (see below), whose sum is σ = 22523538624. Its totient is φ = 15014193264.

The previous prime is 18768678517. The next prime is 18768678557. The reversal of 18768678545 is 54587686781.

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 18768678545 - 2⁸ = 18768678289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31742 + ... + 196328.

It is an arithmetic number, because the mean of its divisors is an integer number (2815442328).

Almost surely, 2^18768678545 is an apocalyptic number.

It is an amenable number.

18768678545 is a deficient number, since it is larger than the sum of its proper divisors (3754860079).

18768678545 is a wasteful number, since it uses less digits than its factorization.

18768678545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187399.

The product of its digits is 90316800, while the sum is 65.

The spelling of 18768678545 in words is "eighteen billion, seven hundred sixty-eight million, six hundred seventy-eight thousand, five hundred forty-five".