135886228561 has 4 divisors (see below), whose sum is σ = 135907952292. Its totient is φ = 135864504832.

The previous prime is 135886228547. The next prime is 135886228567. The reversal of 135886228561 is 165822688531.

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 133841832336 + 2044396225 = 365844^2 + 45215^2 .

It is a cyclic number.

It is not a de Polignac number, because 135886228561 - 2¹³ = 135886220369 is a prime.

It is a super-2 number, since 2×135886228561² (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 (135886228567) 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, 10852480 + ... + 10864993.

It is an arithmetic number, because the mean of its divisors is an integer number (33976988073).

Almost surely, 2^135886228561 is an apocalyptic number.

It is an amenable number.

135886228561 is a deficient number, since it is larger than the sum of its proper divisors (21723731).

135886228561 is an equidigital number, since it uses as much as digits as its factorization.

135886228561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21723730.

The product of its digits is 5529600, while the sum is 55.

The spelling of 135886228561 in words is "one hundred thirty-five billion, eight hundred eighty-six million, two hundred twenty-eight thousand, five hundred sixty-one".