12523576540 has 48 divisors (see below), whose sum is σ = 27198791424. Its totient is φ = 4838745600.

The previous prime is 12523576529. The next prime is 12523576561. The reversal of 12523576540 is 4567532521.

It is a junction number, because it is equal to n+sod(n) for n = 12523576493 and 12523576502.

It is a congruent number.

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, 316752 + ... + 354088.

It is an arithmetic number, because the mean of its divisors is an integer number (566641488).

Almost surely, 2^12523576540 is an apocalyptic number.

12523576540 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 12523576540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13599395712).

12523576540 is an abundant number, since it is smaller than the sum of its proper divisors (14675214884).

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

12523576540 is a wasteful number, since it uses less digits than its factorization.

12523576540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37918 (or 37916 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 12523576540 in words is "twelve billion, five hundred twenty-three million, five hundred seventy-six thousand, five hundred forty".