135521014553 has 4 divisors (see below), whose sum is σ = 135521750820. Its totient is φ = 135520278288.

The previous prime is 135521014507. The next prime is 135521014567. The reversal of 135521014553 is 355410125531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 355410125531 = 347 ⋅1024236673.

It can be written as a sum of positive squares in 2 ways, for example, as 92627705104 + 42893309449 = 304348^2 + 207107^2 .

It is a cyclic number.

It is not a de Polignac number, because 135521014553 - 2²⁸ = 135252579097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135521214553) 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, 182651 + ... + 551727.

It is an arithmetic number, because the mean of its divisors is an integer number (33880437705).

Almost surely, 2^135521014553 is an apocalyptic number.

It is an amenable number.

135521014553 is a deficient number, since it is larger than the sum of its proper divisors (736267).

135521014553 is an equidigital number, since it uses as much as digits as its factorization.

135521014553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736266.

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 135521014553 in words is "one hundred thirty-five billion, five hundred twenty-one million, fourteen thousand, five hundred fifty-three".