18116551047 has 8 divisors (see below), whose sum is σ = 27606173056. Its totient is φ = 10352314872.

The previous prime is 18116551043. The next prime is 18116551087. The reversal of 18116551047 is 74015561181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18116551047 - 2² = 18116551043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18116550996 and 18116551014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18116551043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431346433 + ... + 431346474.

It is an arithmetic number, because the mean of its divisors is an integer number (3450771632).

Almost surely, 2^18116551047 is an apocalyptic number.

18116551047 is a deficient number, since it is larger than the sum of its proper divisors (9489622009).

18116551047 is an equidigital number, since it uses as much as digits as its factorization.

18116551047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862692917.

The product of its (nonzero) digits is 33600, while the sum is 39.

The spelling of 18116551047 in words is "eighteen billion, one hundred sixteen million, five hundred fifty-one thousand, forty-seven".