12402523505 has 16 divisors (see below), whose sum is σ = 15766150080. Its totient is φ = 9339924672.

The previous prime is 12402523501. The next prime is 12402523547. The reversal of 12402523505 is 50532520421.

It is a cyclic number.

It is not a de Polignac number, because 12402523505 - 2² = 12402523501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12402523501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400859 + ... + 430688.

It is an arithmetic number, because the mean of its divisors is an integer number (985384380).

Almost surely, 2^12402523505 is an apocalyptic number.

It is an amenable number.

12402523505 is a deficient number, since it is larger than the sum of its proper divisors (3363626575).

12402523505 is a wasteful number, since it uses less digits than its factorization.

12402523505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831728.

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 12402523505 in words is "twelve billion, four hundred two million, five hundred twenty-three thousand, five hundred five".