18116154691 has 8 divisors (see below), whose sum is σ = 18297287424. Its totient is φ = 17935123080.

The previous prime is 18116154673. The next prime is 18116154733. The reversal of 18116154691 is 19645161181.

It is a happy number.

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 18116154691 - 2¹¹ = 18116152643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18116154191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364656 + ... + 411346.

It is an arithmetic number, because the mean of its divisors is an integer number (2287160928).

Almost surely, 2^18116154691 is an apocalyptic number.

18116154691 is a deficient number, since it is larger than the sum of its proper divisors (181132733).

18116154691 is a wasteful number, since it uses less digits than its factorization.

18116154691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50561.

The product of its digits is 51840, while the sum is 43.

The spelling of 18116154691 in words is "eighteen billion, one hundred sixteen million, one hundred fifty-four thousand, six hundred ninety-one".