12540554424 has 96 divisors (see below), whose sum is σ = 36221094000. Its totient is φ = 3905934336.

The previous prime is 12540554393. The next prime is 12540554447. The reversal of 12540554424 is 42445504521.

12540554424 is a `hidden beast` number, since 1 + 2 + 540 + 55 + 44 + 24 = 666.

It is a super-2 number, since 2×12540554424² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133282 + ... + 206990.

Almost surely, 2^12540554424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12540554424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18110547000).

12540554424 is an abundant number, since it is smaller than the sum of its proper divisors (23680539576).

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

12540554424 is a wasteful number, since it uses less digits than its factorization.

12540554424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73877 (or 73870 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

The spelling of 12540554424 in words is "twelve billion, five hundred forty million, five hundred fifty-four thousand, four hundred twenty-four".