123040540660 has 24 divisors (see below), whose sum is σ = 262241632800. Its totient is φ = 48481645344.

The previous prime is 123040540657. The next prime is 123040540661. The reversal of 123040540660 is 66045040321.

It is a super-2 number, since 2×123040540660² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040540661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45909310 + ... + 45911989.

It is an arithmetic number, because the mean of its divisors is an integer number (10926734700).

Almost surely, 2^123040540660 is an apocalyptic number.

123040540660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123040540660 is an abundant number, since it is smaller than the sum of its proper divisors (139201092140).

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

123040540660 is a wasteful number, since it uses less digits than its factorization.

123040540660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91821375 (or 91821373 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 123040540660 its reverse (66045040321), we get a palindrome (189085580981).

The spelling of 123040540660 in words is "one hundred twenty-three billion, forty million, five hundred forty thousand, six hundred sixty".