135805413861 has 32 divisors (see below), whose sum is σ = 218903368320. Its totient is φ = 82710968832.

The previous prime is 135805413839. The next prime is 135805413883. The reversal of 135805413861 is 168314508531.

135805413861 is a `hidden beast` number, since 1 + 3 + 580 + 5 + 4 + 1 + 3 + 8 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (135805413839) and next prime (135805413883).

It is not a de Polignac number, because 135805413861 - 2¹⁰ = 135805412837 is a prime.

It is a super-2 number, since 2×135805413861² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135805413811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1960335 + ... + 2028428.

It is an arithmetic number, because the mean of its divisors is an integer number (6840730260).

Almost surely, 2^135805413861 is an apocalyptic number.

It is an amenable number.

135805413861 is a deficient number, since it is larger than the sum of its proper divisors (83097954459).

135805413861 is a wasteful number, since it uses less digits than its factorization.

135805413861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988882 (or 3988876 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 135805413861 in words is "one hundred thirty-five billion, eight hundred five million, four hundred thirteen thousand, eight hundred sixty-one".