135121523364 has 36 divisors (see below), whose sum is σ = 343531518876. Its totient is φ = 44780155968.

The previous prime is 135121523357. The next prime is 135121523423. The reversal of 135121523364 is 463325121531.

135121523364 is a `hidden beast` number, since 1 + 3 + 5 + 121 + 523 + 3 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 125027302464 + 10094220900 = 353592^2 + 100470^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10841679 + ... + 10854134.

It is an arithmetic number, because the mean of its divisors is an integer number (9542542191).

Almost surely, 2^135121523364 is an apocalyptic number.

It is an amenable number.

135121523364 is an abundant number, since it is smaller than the sum of its proper divisors (208409995512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135121523364 is a wasteful number, since it uses less digits than its factorization.

135121523364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21695996 (or 21695991 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

Adding to 135121523364 its reverse (463325121531), we get a palindrome (598446644895).

The spelling of 135121523364 in words is "one hundred thirty-five billion, one hundred twenty-one million, five hundred twenty-three thousand, three hundred sixty-four".