12140678538 has 48 divisors (see below), whose sum is σ = 26774931456. Its totient is φ = 3975199200.

The previous prime is 12140678533. The next prime is 12140678573. The reversal of 12140678538 is 83587604121.

12140678538 is a `hidden beast` number, since 1 + 2 + 1 + 40 + 6 + 78 + 538 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12140678493 and 12140678502.

It is not an unprimeable number, because it can be changed into a prime (12140678531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204595 + ... + 257177.

It is an arithmetic number, because the mean of its divisors is an integer number (557811072).

Almost surely, 2^12140678538 is an apocalyptic number.

12140678538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12140678538 is an abundant number, since it is smaller than the sum of its proper divisors (14634252918).

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

12140678538 is a wasteful number, since it uses less digits than its factorization.

12140678538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52819 (or 52816 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 12140678538 in words is "twelve billion, one hundred forty million, six hundred seventy-eight thousand, five hundred thirty-eight".