12545521433 has 8 divisors (see below), whose sum is σ = 13288481640. Its totient is φ = 11803115520.

The previous prime is 12545521411. The next prime is 12545521441. The reversal of 12545521433 is 33412554521.

It can be written as a sum of positive squares in 4 ways, for example, as 2390525449 + 10154995984 = 48893^2 + 100772^2 .

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 12545521433 - 2¹² = 12545517337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12545521393 and 12545521402.

It is not an unprimeable number, because it can be changed into a prime (12545521333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91508 + ... + 182933.

It is an arithmetic number, because the mean of its divisors is an integer number (1661060205).

Almost surely, 2^12545521433 is an apocalyptic number.

It is an amenable number.

12545521433 is a deficient number, since it is larger than the sum of its proper divisors (742960207).

12545521433 is a wasteful number, since it uses less digits than its factorization.

12545521433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277147.

The product of its digits is 72000, while the sum is 35.

The spelling of 12545521433 in words is "twelve billion, five hundred forty-five million, five hundred twenty-one thousand, four hundred thirty-three".