12565523075 has 24 divisors (see below), whose sum is σ = 17990744352. Its totient is φ = 8527518720.

The previous prime is 12565523039. The next prime is 12565523083. The reversal of 12565523075 is 57032556521.

It is a happy number.

It is not a de Polignac number, because 12565523075 - 2¹⁴ = 12565506691 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 353144 + ... + 387093.

It is an arithmetic number, because the mean of its divisors is an integer number (749614348).

Almost surely, 2^12565523075 is an apocalyptic number.

12565523075 is a deficient number, since it is larger than the sum of its proper divisors (5425221277).

12565523075 is an equidigital number, since it uses as much as digits as its factorization.

12565523075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740351 (or 740346 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 41.

The spelling of 12565523075 in words is "twelve billion, five hundred sixty-five million, five hundred twenty-three thousand, seventy-five".