135401553243 has 24 divisors (see below), whose sum is σ = 219126516336. Its totient is φ = 79843665600.

The previous prime is 135401553223. The next prime is 135401553247. The reversal of 135401553243 is 342355104531.

135401553243 is a `hidden beast` number, since 1 + 3 + 5 + 401 + 5 + 5 + 3 + 243 = 666.

It is not a de Polignac number, because 135401553243 - 2⁶ = 135401553179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135401553198 and 135401553207.

It is not an unprimeable number, because it can be changed into a prime (135401553247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18478668 + ... + 18485993.

It is an arithmetic number, because the mean of its divisors is an integer number (9130271514).

Almost surely, 2^135401553243 is an apocalyptic number.

135401553243 is a deficient number, since it is larger than the sum of its proper divisors (83724963093).

135401553243 is a wasteful number, since it uses less digits than its factorization.

135401553243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36964715 (or 36964712 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 135401553243 its reverse (342355104531), we get a palindrome (477756657774).

The spelling of 135401553243 in words is "one hundred thirty-five billion, four hundred one million, five hundred fifty-three thousand, two hundred forty-three".