123655142052 has 240 divisors, whose sum is σ = 364145709312. Its totient is φ = 36304899840.

The previous prime is 123655142047. The next prime is 123655142069. The reversal of 123655142052 is 250241556321.

123655142052 is a `hidden beast` number, since 1 + 2 + 36 + 551 + 4 + 20 + 52 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 123655141998 and 123655142016.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 47177302 + ... + 47179922.

Almost surely, 2^123655142052 is an apocalyptic number.

123655142052 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 123655142052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182072854656).

123655142052 is an abundant number, since it is smaller than the sum of its proper divisors (240490567260).

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

123655142052 is a wasteful number, since it uses less digits than its factorization.

123655142052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160 (or 3149 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 123655142052 its reverse (250241556321), we get a palindrome (373896698373).

The spelling of 123655142052 in words is "one hundred twenty-three billion, six hundred fifty-five million, one hundred forty-two thousand, fifty-two".