123400500552 has 192 divisors, whose sum is σ = 384300259200. Its totient is φ = 35041351680.

The previous prime is 123400500547. The next prime is 123400500557. The reversal of 123400500552 is 255005004321.

It is a happy number.

123400500552 is a `hidden beast` number, since 1 + 23 + 40 + 0 + 50 + 0 + 552 = 666.

It is an interprime number because it is at equal distance from previous prime (123400500547) and next prime (123400500557).

It is not an unprimeable number, because it can be changed into a prime (123400500557) 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, 121099099 + ... + 121100117.

It is an arithmetic number, because the mean of its divisors is an integer number (2001563850).

Almost surely, 2^123400500552 is an apocalyptic number.

123400500552 is a gapful number since it is divisible by the number (12) 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 123400500552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192150129600).

123400500552 is an abundant number, since it is smaller than the sum of its proper divisors (260899758648).

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

123400500552 is a wasteful number, since it uses less digits than its factorization.

123400500552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276 (or 2269 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 123400500552 its reverse (255005004321), we get a palindrome (378405504873).

The spelling of 123400500552 in words is "one hundred twenty-three billion, four hundred million, five hundred thousand, five hundred fifty-two".