12930043557 has 4 divisors (see below), whose sum is σ = 17240058080. Its totient is φ = 8620029036.

The previous prime is 12930043543. The next prime is 12930043573. The reversal of 12930043557 is 75534003921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12930043557 - 2¹² = 12930039461 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 (12930043157) 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, 2155007257 + ... + 2155007262.

It is an arithmetic number, because the mean of its divisors is an integer number (4310014520).

Almost surely, 2^12930043557 is an apocalyptic number.

It is an amenable number.

12930043557 is a deficient number, since it is larger than the sum of its proper divisors (4310014523).

12930043557 is an equidigital number, since it uses as much as digits as its factorization.

12930043557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310014522.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 12930043557 in words is "twelve billion, nine hundred thirty million, forty-three thousand, five hundred fifty-seven".