135646443523 has 4 divisors (see below), whose sum is σ = 135667734448. Its totient is φ = 135625152600.

The previous prime is 135646443509. The next prime is 135646443533. The reversal of 135646443523 is 325344646531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135646443523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135646443533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10635903 + ... + 10648648.

It is an arithmetic number, because the mean of its divisors is an integer number (33916933612).

Almost surely, 2^135646443523 is an apocalyptic number.

135646443523 is a deficient number, since it is larger than the sum of its proper divisors (21290925).

135646443523 is an equidigital number, since it uses as much as digits as its factorization.

135646443523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21290924.

The product of its digits is 3110400, while the sum is 46.

The spelling of 135646443523 in words is "one hundred thirty-five billion, six hundred forty-six million, four hundred forty-three thousand, five hundred twenty-three".