135426666561 has 4 divisors (see below), whose sum is σ = 180568888752. Its totient is φ = 90284444372.

The previous prime is 135426666553. The next prime is 135426666601. The reversal of 135426666561 is 165666624531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135426666561 - 2³ = 135426666553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135426666521) 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, 22571111091 + ... + 22571111096.

It is an arithmetic number, because the mean of its divisors is an integer number (45142222188).

Almost surely, 2^135426666561 is an apocalyptic number.

It is an amenable number.

135426666561 is a deficient number, since it is larger than the sum of its proper divisors (45142222191).

135426666561 is an equidigital number, since it uses as much as digits as its factorization.

135426666561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45142222190.

The product of its digits is 4665600, while the sum is 51.

The spelling of 135426666561 in words is "one hundred thirty-five billion, four hundred twenty-six million, six hundred sixty-six thousand, five hundred sixty-one".