135805260531 has 8 divisors (see below), whose sum is σ = 181387502224. Its totient is φ = 90379929600.

The previous prime is 135805260509. The next prime is 135805260583. The reversal of 135805260531 is 135062508531.

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

It is not a de Polignac number, because 135805260531 - 2¹³ = 135805252339 is a prime.

It is a super-2 number, since 2×135805260531² (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 135805260531.

It is not an unprimeable number, because it can be changed into a prime (135805260131) 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, 39225670 + ... + 39229131.

It is an arithmetic number, because the mean of its divisors is an integer number (22673437778).

Almost surely, 2^135805260531 is an apocalyptic number.

135805260531 is a deficient number, since it is larger than the sum of its proper divisors (45582241693).

135805260531 is an equidigital number, since it uses as much as digits as its factorization.

135805260531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78455381.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 135805260531 in words is "one hundred thirty-five billion, eight hundred five million, two hundred sixty thousand, five hundred thirty-one".