18485646505 has 8 divisors (see below), whose sum is σ = 22199601600. Its totient is φ = 14777300016.

The previous prime is 18485646467. The next prime is 18485646527. The reversal of 18485646505 is 50564658481.

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 18485646505 - 2⁹ = 18485645993 is a prime.

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, 1394895 + ... + 1408084.

It is an arithmetic number, because the mean of its divisors is an integer number (2774950200).

Almost surely, 2^18485646505 is an apocalyptic number.

It is an amenable number.

18485646505 is a deficient number, since it is larger than the sum of its proper divisors (3713955095).

18485646505 is a wasteful number, since it uses less digits than its factorization.

18485646505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804303.

The product of its (nonzero) digits is 4608000, while the sum is 52.

It can be divided in two parts, 184856 and 46505, that added together give a square (231361 = 481²).

The spelling of 18485646505 in words is "eighteen billion, four hundred eighty-five million, six hundred forty-six thousand, five hundred five".