123256723134 has 8 divisors (see below), whose sum is σ = 246513446280. Its totient is φ = 41085574376.

The previous prime is 123256723129. The next prime is 123256723141. The reversal of 123256723134 is 431327652321.

It is a happy number.

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

123256723134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 123256723092 and 123256723101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10271393589 + ... + 10271393600.

It is an arithmetic number, because the mean of its divisors is an integer number (30814180785).

Almost surely, 2^123256723134 is an apocalyptic number.

123256723134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123256723134 is a wasteful number, since it uses less digits than its factorization.

123256723134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20542787194.

The product of its digits is 181440, while the sum is 39.

The spelling of 123256723134 in words is "one hundred twenty-three billion, two hundred fifty-six million, seven hundred twenty-three thousand, one hundred thirty-four".