123553243620 has 192 divisors, whose sum is σ = 408101379840. Its totient is φ = 30925449216.

The previous prime is 123553243609. The next prime is 123553243679. The reversal of 123553243620 is 26342355321.

123553243620 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 5 + 3 + 24 + 3 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3406099 + ... + 3442181.

It is an arithmetic number, because the mean of its divisors is an integer number (2125528020).

Almost surely, 2^123553243620 is an apocalyptic number.

123553243620 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 123553243620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204050689920).

123553243620 is an abundant number, since it is smaller than the sum of its proper divisors (284548136220).

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

123553243620 is a wasteful number, since it uses less digits than its factorization.

123553243620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36491 (or 36483 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

Adding to 123553243620 its reverse (26342355321), we get a palindrome (149895598941).

The spelling of 123553243620 in words is "one hundred twenty-three billion, five hundred fifty-three million, two hundred forty-three thousand, six hundred twenty".