12423853557 has 6 divisors (see below), whose sum is σ = 17945566262. Its totient is φ = 8282569032.

The previous prime is 12423853553. The next prime is 12423853577. The reversal of 12423853557 is 75535832421.

12423853557 is a `hidden beast` number, since 1 + 2 + 42 + 3 + 8 + 53 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6846900516 + 5576953041 = 82746^2 + 74679^2 .

It is not a de Polignac number, because 12423853557 - 2² = 12423853553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423853553) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 690214078 + ... + 690214095.

Almost surely, 2^12423853557 is an apocalyptic number.

It is an amenable number.

12423853557 is a deficient number, since it is larger than the sum of its proper divisors (5521712705).

12423853557 is a wasteful number, since it uses less digits than its factorization.

12423853557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380428179 (or 1380428176 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 12423853557 in words is "twelve billion, four hundred twenty-three million, eight hundred fifty-three thousand, five hundred fifty-seven".