12511805825523 has 16 divisors (see below), whose sum is σ = 17226902403072. Its totient is φ = 8069155080000.

The previous prime is 12511805825509. The next prime is 12511805825557. The reversal of 12511805825523 is 32552850811521.

It is a de Polignac number, because none of the positive numbers 2^k-12511805825523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12511805825723) 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, 24560778 + ... + 25065023.

It is an arithmetic number, because the mean of its divisors is an integer number (1076681400192).

Almost surely, 2^{12511805825523} is an apocalyptic number.

12511805825523 is a deficient number, since it is larger than the sum of its proper divisors (4715096577549).

12511805825523 is a wasteful number, since it uses less digits than its factorization.

12511805825523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49628546.

The product of its (nonzero) digits is 960000, while the sum is 48.

The spelling of 12511805825523 in words is "twelve trillion, five hundred eleven billion, eight hundred five million, eight hundred twenty-five thousand, five hundred twenty-three".