16406441491 has 4 divisors (see below), whose sum is σ = 17897936184. Its totient is φ = 14914946800.

The previous prime is 16406441483. The next prime is 16406441497. The reversal of 16406441491 is 19414460461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16406441491 - 2³ = 16406441483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16406441497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745747330 + ... + 745747351.

It is an arithmetic number, because the mean of its divisors is an integer number (4474484046).

Almost surely, 2^16406441491 is an apocalyptic number.

16406441491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16406441491 is a deficient number, since it is larger than the sum of its proper divisors (1491494693).

16406441491 is a wasteful number, since it uses less digits than its factorization.

16406441491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491494692.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 16406441491 in words is "sixteen billion, four hundred six million, four hundred forty-one thousand, four hundred ninety-one".