16013252405 has 4 divisors (see below), whose sum is σ = 19215902892. Its totient is φ = 12810601920.

The previous prime is 16013252401. The next prime is 16013252407. The reversal of 16013252405 is 50425231061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4610002609 + 11403249796 = 67897^2 + 106786^2 .

It is not a de Polignac number, because 16013252405 - 2² = 16013252401 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 (16013252401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601325236 + ... + 1601325245.

It is an arithmetic number, because the mean of its divisors is an integer number (4803975723).

Almost surely, 2^16013252405 is an apocalyptic number.

It is an amenable number.

16013252405 is a deficient number, since it is larger than the sum of its proper divisors (3202650487).

16013252405 is an equidigital number, since it uses as much as digits as its factorization.

16013252405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202650486.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 16013252405 its reverse (50425231061), we get a palindrome (66438483466).

The spelling of 16013252405 in words is "sixteen billion, thirteen million, two hundred fifty-two thousand, four hundred five".