12578033447 has 4 divisors (see below), whose sum is σ = 14374895376. Its totient is φ = 10781171520.

The previous prime is 12578033443. The next prime is 12578033449. The reversal of 12578033447 is 74433087521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12578033447 - 2² = 12578033443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12578033398 and 12578033407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12578033443) 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, 898430954 + ... + 898430967.

It is an arithmetic number, because the mean of its divisors is an integer number (3593723844).

Almost surely, 2^12578033447 is an apocalyptic number.

12578033447 is a deficient number, since it is larger than the sum of its proper divisors (1796861929).

12578033447 is an equidigital number, since it uses as much as digits as its factorization.

12578033447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796861928.

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 12578033447 in words is "twelve billion, five hundred seventy-eight million, thirty-three thousand, four hundred forty-seven".