136564641397 has 8 divisors (see below), whose sum is σ = 139522786200. Its totient is φ = 133638134784.

The previous prime is 136564641377. The next prime is 136564641439. The reversal of 136564641397 is 793146465631.

It can be written as a sum of positive squares in 4 ways, for example, as 28060940196 + 108503701201 = 167514^2 + 329399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136564641397 - 2¹¹ = 136564639349 is a prime.

It is a super-3 number, since 3×136564641397³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136564641377) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7900822 + ... + 7918087.

It is an arithmetic number, because the mean of its divisors is an integer number (17440348275).

Almost surely, 2^136564641397 is an apocalyptic number.

It is an amenable number.

136564641397 is a deficient number, since it is larger than the sum of its proper divisors (2958144803).

136564641397 is an equidigital number, since it uses as much as digits as its factorization.

136564641397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15819095.

The product of its digits is 9797760, while the sum is 55.

The spelling of 136564641397 in words is "one hundred thirty-six billion, five hundred sixty-four million, six hundred forty-one thousand, three hundred ninety-seven".