16326227391 has 8 divisors (see below), whose sum is σ = 21927196464. Its totient is φ = 10804704960.

The previous prime is 16326227381. The next prime is 16326227419. The reversal of 16326227391 is 19372262361.

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

It is not a de Polignac number, because 16326227391 - 2¹⁵ = 16326194623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16326227341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19861180 + ... + 19862001.

It is an arithmetic number, because the mean of its divisors is an integer number (2740899558).

Almost surely, 2^16326227391 is an apocalyptic number.

16326227391 is a deficient number, since it is larger than the sum of its proper divisors (5600969073).

16326227391 is a wasteful number, since it uses less digits than its factorization.

16326227391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39723321.

The product of its digits is 163296, while the sum is 42.

It can be divided in two parts, 163262 and 27391, that added together give a triangular number (190653 = T₆₁₇).

The spelling of 16326227391 in words is "sixteen billion, three hundred twenty-six million, two hundred twenty-seven thousand, three hundred ninety-one".