16403604539 has 16 divisors (see below), whose sum is σ = 18797764608. Its totient is φ = 14022202272.

The previous prime is 16403604527. The next prime is 16403604541. The reversal of 16403604539 is 93540630461.

It is a cyclic number.

It is not a de Polignac number, because 16403604539 - 2¹² = 16403600443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16403604496 and 16403604505.

It is not an unprimeable number, because it can be changed into a prime (16403600539) 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 15 ways as a sum of consecutive naturals, for example, 4812974 + ... + 4816380.

It is an arithmetic number, because the mean of its divisors is an integer number (1174860288).

Almost surely, 2^16403604539 is an apocalyptic number.

16403604539 is a deficient number, since it is larger than the sum of its proper divisors (2394160069).

16403604539 is an equidigital number, since it uses as much as digits as its factorization.

16403604539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 16403604539 in words is "sixteen billion, four hundred three million, six hundred four thousand, five hundred thirty-nine".