12503520541 has 4 divisors (see below), whose sum is σ = 12550002300. Its totient is φ = 12457038784.

The previous prime is 12503520539. The next prime is 12503520559. The reversal of 12503520541 is 14502530521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14502530521 = 2381 ⋅6090941.

It can be written as a sum of positive squares in 2 ways, for example, as 7677439641 + 4826080900 = 87621^2 + 69470^2 .

It is a cyclic number.

It is not a de Polignac number, because 12503520541 - 2¹ = 12503520539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503520581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23240476 + ... + 23241013.

It is an arithmetic number, because the mean of its divisors is an integer number (3137500575).

Almost surely, 2^12503520541 is an apocalyptic number.

It is an amenable number.

12503520541 is a deficient number, since it is larger than the sum of its proper divisors (46481759).

12503520541 is an equidigital number, since it uses as much as digits as its factorization.

12503520541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46481758.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 12503520541 in words is "twelve billion, five hundred three million, five hundred twenty thousand, five hundred forty-one".