135555042001 has 4 divisors (see below), whose sum is σ = 135821358900. Its totient is φ = 135288725104.

The previous prime is 135555041981. The next prime is 135555042011. The reversal of 135555042001 is 100240555531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100240555531 = 103 ⋅973209277.

It can be written as a sum of positive squares in 2 ways, for example, as 53157913600 + 82397128401 = 230560^2 + 287049^2 .

It is a cyclic number.

It is not a de Polignac number, because 135555042001 - 2¹⁷ = 135554910929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135555042011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 133157686 + ... + 133158703.

It is an arithmetic number, because the mean of its divisors is an integer number (33955339725).

Almost surely, 2^135555042001 is an apocalyptic number.

It is an amenable number.

135555042001 is a deficient number, since it is larger than the sum of its proper divisors (266316899).

135555042001 is an equidigital number, since it uses as much as digits as its factorization.

135555042001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266316898.

The product of its (nonzero) digits is 15000, while the sum is 31.

Adding to 135555042001 its reverse (100240555531), we get a palindrome (235795597532).

The spelling of 135555042001 in words is "one hundred thirty-five billion, five hundred fifty-five million, forty-two thousand, one".