12540451140 has 144 divisors (see below), whose sum is σ = 43629505920. Its totient is φ = 2856107520.

The previous prime is 12540451109. The next prime is 12540451141. The reversal of 12540451140 is 4115404521.

12540451140 is a `hidden beast` number, since 1 + 2 + 540 + 4 + 5 + 114 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (12540451141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 336351 + ... + 371769.

It is an arithmetic number, because the mean of its divisors is an integer number (302982680).

Almost surely, 2^12540451140 is an apocalyptic number.

12540451140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12540451140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21814752960).

12540451140 is an abundant number, since it is smaller than the sum of its proper divisors (31089054780).

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

12540451140 is a wasteful number, since it uses less digits than its factorization.

12540451140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35722 (or 35717 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 12540451140 its reverse (4115404521), we get a palindrome (16655855661).

The spelling of 12540451140 in words is "twelve billion, five hundred forty million, four hundred fifty-one thousand, one hundred forty".