123543640236 has 24 divisors (see below), whose sum is σ = 293154402240. Its totient is φ = 40483226512.

The previous prime is 123543640223. The next prime is 123543640249. The reversal of 123543640236 is 632046345321.

123543640236 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (123543640223) and next prime (123543640249).

It is a junction number, because it is equal to n+sod(n) for n = 123543640194 and 123543640203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87247626 + ... + 87249041.

It is an arithmetic number, because the mean of its divisors is an integer number (12214766760).

Almost surely, 2^123543640236 is an apocalyptic number.

It is an amenable number.

123543640236 is an abundant number, since it is smaller than the sum of its proper divisors (169610762004).

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

123543640236 is a wasteful number, since it uses less digits than its factorization.

123543640236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174496733 (or 174496731 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 39.

Adding to 123543640236 its reverse (632046345321), we get a palindrome (755589985557).

The spelling of 123543640236 in words is "one hundred twenty-three billion, five hundred forty-three million, six hundred forty thousand, two hundred thirty-six".