123540404412 has 24 divisors (see below), whose sum is σ = 303432572800. Its totient is φ = 39012759216.

The previous prime is 123540404371. The next prime is 123540404443. The reversal of 123540404412 is 214404045321.

It is a self number, because there is not a number n which added to its sum of digits gives 123540404412.

It is a congruent number.

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, 270921712 + ... + 270922167.

Almost surely, 2^123540404412 is an apocalyptic number.

123540404412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123540404412 is an abundant number, since it is smaller than the sum of its proper divisors (179892168388).

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

123540404412 is a wasteful number, since it uses less digits than its factorization.

123540404412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541843905 (or 541843903 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 123540404412 its reverse (214404045321), we get a palindrome (337944449733).

The spelling of 123540404412 in words is "one hundred twenty-three billion, five hundred forty million, four hundred four thousand, four hundred twelve".