16400111 has 8 divisors (see below), whose sum is σ = 20184864. Its totient is φ = 12975840.

The previous prime is 16400101. The next prime is 16400141. The reversal of 16400111 is 11100461.

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 16400111 - 2⁶ = 16400047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400101) 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, 90020 + ... + 90201.

It is an arithmetic number, because the mean of its divisors is an integer number (2523108).

Almost surely, 2^16400111 is an apocalyptic number.

16400111 is a deficient number, since it is larger than the sum of its proper divisors (3784753).

16400111 is a wasteful number, since it uses less digits than its factorization.

16400111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180241.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 16400111 is about 4049.7050509883. The cubic root of 16400111 is about 254.0673917527.

Adding to 16400111 its reverse (11100461), we get a palindrome (27500572).

The spelling of 16400111 in words is "sixteen million, four hundred thousand, one hundred eleven".