123255158105 has 4 divisors (see below), whose sum is σ = 147906189732. Its totient is φ = 98604126480.

The previous prime is 123255158051. The next prime is 123255158171. The reversal of 123255158105 is 501851552321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501851552321 = 7 ⋅71693078903.

It can be written as a sum of positive squares in 2 ways, for example, as 21772773136 + 101482384969 = 147556^2 + 318563^2 .

It is not a de Polignac number, because 123255158105 - 2⁶ = 123255158041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 12325515806 + ... + 12325515815.

It is an arithmetic number, because the mean of its divisors is an integer number (36976547433).

Almost surely, 2^123255158105 is an apocalyptic number.

It is an amenable number.

123255158105 is a deficient number, since it is larger than the sum of its proper divisors (24651031627).

123255158105 is an equidigital number, since it uses as much as digits as its factorization.

123255158105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24651031626.

The product of its (nonzero) digits is 60000, while the sum is 38.

The spelling of 123255158105 in words is "one hundred twenty-three billion, two hundred fifty-five million, one hundred fifty-eight thousand, one hundred five".