16256651405 has 4 divisors (see below), whose sum is σ = 19507981692. Its totient is φ = 13005321120.

The previous prime is 16256651371. The next prime is 16256651417. The reversal of 16256651405 is 50415665261.

16256651405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2195672164 + 14060979241 = 46858^2 + 118579^2 .

It is not a de Polignac number, because 16256651405 - 2¹⁰ = 16256650381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625665136 + ... + 1625665145.

It is an arithmetic number, because the mean of its divisors is an integer number (4876995423).

Almost surely, 2^16256651405 is an apocalyptic number.

It is an amenable number.

16256651405 is a deficient number, since it is larger than the sum of its proper divisors (3251330287).

16256651405 is an equidigital number, since it uses as much as digits as its factorization.

16256651405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251330286.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 16256651405 in words is "sixteen billion, two hundred fifty-six million, six hundred fifty-one thousand, four hundred five".