135416564561 has 4 divisors (see below), whose sum is σ = 140086101300. Its totient is φ = 130747027824.

The previous prime is 135416564557. The next prime is 135416564567. The reversal of 135416564561 is 165465614531.

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 56879865025 + 78536699536 = 238495^2 + 280244^2 .

It is a cyclic number.

It is not a de Polignac number, because 135416564561 - 2² = 135416564557 is a prime.

It is a super-2 number, since 2×135416564561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135416564567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2334768326 + ... + 2334768383.

It is an arithmetic number, because the mean of its divisors is an integer number (35021525325).

Almost surely, 2^135416564561 is an apocalyptic number.

It is an amenable number.

135416564561 is a deficient number, since it is larger than the sum of its proper divisors (4669536739).

135416564561 is an equidigital number, since it uses as much as digits as its factorization.

135416564561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669536738.

The product of its digits is 1296000, while the sum is 47.

The spelling of 135416564561 in words is "one hundred thirty-five billion, four hundred sixteen million, five hundred sixty-four thousand, five hundred sixty-one".