123543540660 has 24 divisors (see below), whose sum is σ = 345921914016. Its totient is φ = 32944944160.

The previous prime is 123543540643. The next prime is 123543540691. The reversal of 123543540660 is 66045345321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029529446 + ... + 1029529565.

It is an arithmetic number, because the mean of its divisors is an integer number (14413413084).

Almost surely, 2^123543540660 is an apocalyptic number.

123543540660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123543540660 is an abundant number, since it is smaller than the sum of its proper divisors (222378373356).

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

123543540660 is a wasteful number, since it uses less digits than its factorization.

123543540660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059059023 (or 2059059021 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 123543540660 its reverse (66045345321), we get a palindrome (189588885981).

The spelling of 123543540660 in words is "one hundred twenty-three billion, five hundred forty-three million, five hundred forty thousand, six hundred sixty".