123505220660 has 48 divisors (see below), whose sum is σ = 274902211584. Its totient is φ = 46447876608.

The previous prime is 123505220627. The next prime is 123505220723. The reversal of 123505220660 is 66022505321.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 140957 + ... + 516603.

It is an arithmetic number, because the mean of its divisors is an integer number (5727129408).

Almost surely, 2^123505220660 is an apocalyptic number.

123505220660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123505220660 is an abundant number, since it is smaller than the sum of its proper divisors (151396990924).

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

123505220660 is a wasteful number, since it uses less digits than its factorization.

123505220660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376640 (or 376638 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 123505220660 its reverse (66022505321), we get a palindrome (189527725981).

The spelling of 123505220660 in words is "one hundred twenty-three billion, five hundred five million, two hundred twenty thousand, six hundred sixty".