123127265660 has 120 divisors (see below), whose sum is σ = 304326678096. Its totient is φ = 41839633920.

The previous prime is 123127265659. The next prime is 123127265687. The reversal of 123127265660 is 66562721321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5414915 + ... + 5437605.

Almost surely, 2^123127265660 is an apocalyptic number.

123127265660 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 123127265660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152163339048).

123127265660 is an abundant number, since it is smaller than the sum of its proper divisors (181199412436).

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

123127265660 is a wasteful number, since it uses less digits than its factorization.

123127265660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22841 (or 22818 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

Adding to 123127265660 its reverse (66562721321), we get a palindrome (189689986981).

The spelling of 123127265660 in words is "one hundred twenty-three billion, one hundred twenty-seven million, two hundred sixty-five thousand, six hundred sixty".