136406221225 has 24 divisors (see below), whose sum is σ = 169686398552. Its totient is φ = 108775180800.

The previous prime is 136406221169. The next prime is 136406221241. The reversal of 136406221225 is 522122604631.

It can be written as a sum of positive squares in 12 ways, for example, as 11785924969 + 124620296256 = 108563^2 + 353016^2 .

It is not a de Polignac number, because 136406221225 - 2¹¹ = 136406219177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 32010595 + ... + 32014855.

Almost surely, 2^136406221225 is an apocalyptic number.

It is an amenable number.

136406221225 is a deficient number, since it is larger than the sum of its proper divisors (33280177327).

136406221225 is a wasteful number, since it uses less digits than its factorization.

136406221225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8077 (or 8072 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 136406221225 its reverse (522122604631), we get a palindrome (658528825856).

The spelling of 136406221225 in words is "one hundred thirty-six billion, four hundred six million, two hundred twenty-one thousand, two hundred twenty-five".