12542320040 has 64 divisors (see below), whose sum is σ = 28349118720. Its totient is φ = 4994080000.

The previous prime is 12542320009. The next prime is 12542320057. The reversal of 12542320040 is 4002324521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12542319988 and 12542320015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13767185 + ... + 13768095.

It is an arithmetic number, because the mean of its divisors is an integer number (442954980).

Almost surely, 2^12542320040 is an apocalyptic number.

12542320040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12542320040 is an abundant number, since it is smaller than the sum of its proper divisors (15806798680).

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

12542320040 is a wasteful number, since it uses less digits than its factorization.

12542320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 12542320040 its reverse (4002324521), we get a palindrome (16544644561).

The spelling of 12542320040 in words is "twelve billion, five hundred forty-two million, three hundred twenty thousand, forty".