12558476477 has 4 divisors (see below), whose sum is σ = 12991527420. Its totient is φ = 12125425536.

The previous prime is 12558476467. The next prime is 12558476479. The reversal of 12558476477 is 77467485521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77467485521 = 17 ⋅4556910913.

It can be written as a sum of positive squares in 2 ways, for example, as 2587655161 + 9970821316 = 50869^2 + 99854^2 .

It is a cyclic number.

It is not a de Polignac number, because 12558476477 - 2⁸ = 12558476221 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 (12558476479) 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, 216525428 + ... + 216525485.

It is an arithmetic number, because the mean of its divisors is an integer number (3247881855).

Almost surely, 2^12558476477 is an apocalyptic number.

It is an amenable number.

12558476477 is a deficient number, since it is larger than the sum of its proper divisors (433050943).

12558476477 is an equidigital number, since it uses as much as digits as its factorization.

12558476477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433050942.

The product of its digits is 13171200, while the sum is 56.

The spelling of 12558476477 in words is "twelve billion, five hundred fifty-eight million, four hundred seventy-six thousand, four hundred seventy-seven".