18169016977 has 8 divisors (see below), whose sum is σ = 18394074720. Its totient is φ = 17944105920.

The previous prime is 18169016909. The next prime is 18169017029. The reversal of 18169016977 is 77961096181.

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 18169016977 - 2²⁷ = 18034799249 is a prime.

It is a super-2 number, since 2×18169016977² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18169016077) 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, 223974 + ... + 294112.

It is an arithmetic number, because the mean of its divisors is an integer number (2299259340).

Almost surely, 2^18169016977 is an apocalyptic number.

It is an amenable number.

18169016977 is a deficient number, since it is larger than the sum of its proper divisors (225057743).

18169016977 is an equidigital number, since it uses as much as digits as its factorization.

18169016977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73343.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 18169016977 in words is "eighteen billion, one hundred sixty-nine million, sixteen thousand, nine hundred seventy-seven".