12571638047 has 4 divisors (see below), whose sum is σ = 12777730536. Its totient is φ = 12365545560.

The previous prime is 12571638043. The next prime is 12571638109. The reversal of 12571638047 is 74083617521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74083617521 = 37 ⋅2002259933.

It is a cyclic number.

It is not a de Polignac number, because 12571638047 - 2² = 12571638043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12571637989 and 12571638007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12571638043) 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, 103046153 + ... + 103046274.

It is an arithmetic number, because the mean of its divisors is an integer number (3194432634).

Almost surely, 2^12571638047 is an apocalyptic number.

12571638047 is a deficient number, since it is larger than the sum of its proper divisors (206092489).

12571638047 is an equidigital number, since it uses as much as digits as its factorization.

12571638047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206092488.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 12571638047 in words is "twelve billion, five hundred seventy-one million, six hundred thirty-eight thousand, forty-seven".