105842539149 has 4 divisors (see below), whose sum is σ = 141123385536. Its totient is φ = 70561692764.

The previous prime is 105842539147. The next prime is 105842539211. The reversal of 105842539149 is 941935248501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 105842539149 - 2¹ = 105842539147 is a prime.

It is a super-2 number, since 2×105842539149² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105842539147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17640423189 + ... + 17640423194.

It is an arithmetic number, because the mean of its divisors is an integer number (35280846384).

Almost surely, 2^105842539149 is an apocalyptic number.

It is an amenable number.

105842539149 is a deficient number, since it is larger than the sum of its proper divisors (35280846387).

105842539149 is an equidigital number, since it uses as much as digits as its factorization.

105842539149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35280846386.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 105842539149 in words is "one hundred five billion, eight hundred forty-two million, five hundred thirty-nine thousand, one hundred forty-nine".