136620650305 has 4 divisors (see below), whose sum is σ = 163944780372. Its totient is φ = 109296520240.

The previous prime is 136620650291. The next prime is 136620650329. The reversal of 136620650305 is 503056026631.

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 39337168896 + 97283481409 = 198336^2 + 311903^2 .

It is not a de Polignac number, because 136620650305 - 2⁹ = 136620649793 is a prime.

It is a super-2 number, since 2×136620650305² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13662065026 + ... + 13662065035.

It is an arithmetic number, because the mean of its divisors is an integer number (40986195093).

Almost surely, 2^136620650305 is an apocalyptic number.

It is an amenable number.

136620650305 is a deficient number, since it is larger than the sum of its proper divisors (27324130067).

136620650305 is an equidigital number, since it uses as much as digits as its factorization.

136620650305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27324130066.

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 136620650305 its reverse (503056026631), we get a palindrome (639676676936).

The spelling of 136620650305 in words is "one hundred thirty-six billion, six hundred twenty million, six hundred fifty thousand, three hundred five".