16399835445 has 32 divisors (see below), whose sum is σ = 29994319872. Its totient is φ = 7495555392.

The previous prime is 16399835423. The next prime is 16399835447. The reversal of 16399835445 is 54453899361.

It is not a de Polignac number, because 16399835445 - 2¹⁶ = 16399769909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16399835447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634444 + ... + 659786.

It is an arithmetic number, because the mean of its divisors is an integer number (937322496).

Almost surely, 2^16399835445 is an apocalyptic number.

16399835445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16399835445 is a deficient number, since it is larger than the sum of its proper divisors (13594484427).

16399835445 is a wasteful number, since it uses less digits than its factorization.

16399835445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31521.

The product of its digits is 13996800, while the sum is 57.

The spelling of 16399835445 in words is "sixteen billion, three hundred ninety-nine million, eight hundred thirty-five thousand, four hundred forty-five".