123134042340 has 144 divisors (see below), whose sum is σ = 395372577600. Its totient is φ = 30966130944.

The previous prime is 123134042329. The next prime is 123134042341. The reversal of 123134042340 is 43240431321.

123134042340 is a `hidden beast` number, since 1 + 2 + 313 + 4 + 0 + 4 + 2 + 340 = 666.

It is not an unprimeable number, because it can be changed into a prime (123134042341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49830 + ... + 498749.

It is an arithmetic number, because the mean of its divisors is an integer number (2745642900).

Almost surely, 2^123134042340 is an apocalyptic number.

123134042340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123134042340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197686288800).

123134042340 is an abundant number, since it is smaller than the sum of its proper divisors (272238535260).

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

123134042340 is a wasteful number, since it uses less digits than its factorization.

123134042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548666 (or 548661 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 123134042340 its reverse (43240431321), we get a palindrome (166374473661).

The spelling of 123134042340 in words is "one hundred twenty-three billion, one hundred thirty-four million, forty-two thousand, three hundred forty".