13645744226 has 32 divisors (see below), whose sum is σ = 21274110000. Its totient is φ = 6559149312.

The previous prime is 13645744223. The next prime is 13645744243. The reversal of 13645744226 is 62244754631.

It is a Cunningham number, because it is equal to 116815²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 5097817201 + 8547927025 = 71399^2 + 92455^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13645744223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3135500 + ... + 3139848.

Almost surely, 2^13645744226 is an apocalyptic number.

13645744226 is a deficient number, since it is larger than the sum of its proper divisors (7628365774).

13645744226 is a wasteful number, since it uses less digits than its factorization.

13645744226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886.

The product of its digits is 967680, while the sum is 44.

The spelling of 13645744226 in words is "thirteen billion, six hundred forty-five million, seven hundred forty-four thousand, two hundred twenty-six".