16391820533 has 8 divisors (see below), whose sum is σ = 18262454400. Its totient is φ = 14584598080.

The previous prime is 16391820517. The next prime is 16391820559. The reversal of 16391820533 is 33502819361.

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 16391820533 - 2⁴ = 16391820517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16391820233) 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, 15852308 + ... + 15853341.

It is an arithmetic number, because the mean of its divisors is an integer number (2282806800).

Almost surely, 2^16391820533 is an apocalyptic number.

It is an amenable number.

16391820533 is a deficient number, since it is larger than the sum of its proper divisors (1870633867).

16391820533 is a wasteful number, since it uses less digits than its factorization.

16391820533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31705707.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 16391820533 in words is "sixteen billion, three hundred ninety-one million, eight hundred twenty thousand, five hundred thirty-three".