123555041280 has 1248 divisors, whose sum is σ = 505761879168. Its totient is φ = 28665446400.

The previous prime is 123555041257. The next prime is 123555041329. The reversal of 123555041280 is 82140555321.

123555041280 is a `hidden beast` number, since 1 + 23 + 5 + 5 + 504 + 128 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2025492450 + ... + 2025492510.

It is an arithmetic number, because the mean of its divisors is an integer number (405257916).

Almost surely, 2^123555041280 is an apocalyptic number.

123555041280 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 123555041280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252880939584).

123555041280 is an abundant number, since it is smaller than the sum of its proper divisors (382206837888).

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

123555041280 is an equidigital number, since it uses as much as digits as its factorization.

123555041280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

It can be divided in two parts, 123555041 and 280, that added together give a palindrome (123555321).

The spelling of 123555041280 in words is "one hundred twenty-three billion, five hundred fifty-five million, forty-one thousand, two hundred eighty".