12541540407 has 32 divisors (see below), whose sum is σ = 19514525184. Its totient is φ = 7080038400.

The previous prime is 12541540399. The next prime is 12541540421. The reversal of 12541540407 is 70404514521.

It is not a de Polignac number, because 12541540407 - 2³ = 12541540399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12541540807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60819 + ... + 169652.

It is an arithmetic number, because the mean of its divisors is an integer number (609828912).

Almost surely, 2^12541540407 is an apocalyptic number.

12541540407 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12541540407 is a deficient number, since it is larger than the sum of its proper divisors (6972984777).

12541540407 is a wasteful number, since it uses less digits than its factorization.

12541540407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230599.

The product of its (nonzero) digits is 22400, while the sum is 33.

The spelling of 12541540407 in words is "twelve billion, five hundred forty-one million, five hundred forty thousand, four hundred seven".