12545125355531 has 4 divisors (see below), whose sum is σ = 12545134323792. Its totient is φ = 12545116387272.

The previous prime is 12545125355311. The next prime is 12545125355549. The reversal of 12545125355531 is 13555352154521.

12545125355531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12545125355531 - 2¹⁸ = 12545125093387 is a prime.

It is a super-2 number, since 2×12545125355531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12245125355531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1882880 + ... + 5351213.

It is an arithmetic number, because the mean of its divisors is an integer number (3136283580948).

Almost surely, 2^{12545125355531} is an apocalyptic number.

12545125355531 is a deficient number, since it is larger than the sum of its proper divisors (8968261).

12545125355531 is an equidigital number, since it uses as much as digits as its factorization.

12545125355531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8968260.

The product of its digits is 2250000, while the sum is 47.

The spelling of 12545125355531 in words is "twelve trillion, five hundred forty-five billion, one hundred twenty-five million, three hundred fifty-five thousand, five hundred thirty-one".