12523555505 has 8 divisors (see below), whose sum is σ = 15029601192. Its totient is φ = 10017954688.

The previous prime is 12523555487. The next prime is 12523555531. The reversal of 12523555505 is 50555532521.

It can be written as a sum of positive squares in 4 ways, for example, as 1851839089 + 10671716416 = 43033^2 + 103304^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12523555505 - 2¹⁰ = 12523554481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45782 + ... + 164751.

It is an arithmetic number, because the mean of its divisors is an integer number (1878700149).

Almost surely, 2^12523555505 is an apocalyptic number.

It is an amenable number.

12523555505 is a deficient number, since it is larger than the sum of its proper divisors (2506045687).

12523555505 is a wasteful number, since it uses less digits than its factorization.

12523555505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222435.

The product of its (nonzero) digits is 187500, while the sum is 38.

The spelling of 12523555505 in words is "twelve billion, five hundred twenty-three million, five hundred fifty-five thousand, five hundred five".