135844448531 has 8 divisors (see below), whose sum is σ = 148196743344. Its totient is φ = 123492620320.

The previous prime is 135844448527. The next prime is 135844448543.

It is a happy number.

135844448531 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135844448531 - 2² = 135844448527 is a prime.

It is a super-2 number, since 2×135844448531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135844448531.

It is not an unprimeable number, because it can be changed into a prime (135844448581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817121 + ... + 969213.

It is an arithmetic number, because the mean of its divisors is an integer number (18524592918).

Almost surely, 2^135844448531 is an apocalyptic number.

135844448531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135844448531 is a deficient number, since it is larger than the sum of its proper divisors (12352294813).

135844448531 is a wasteful number, since it uses less digits than its factorization.

135844448531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233301.

The product of its digits is 3686400, while the sum is 50.

The spelling of 135844448531 in words is "one hundred thirty-five billion, eight hundred forty-four million, four hundred forty-eight thousand, five hundred thirty-one".