12647836457 has 4 divisors (see below), whose sum is σ = 13313512080. Its totient is φ = 11982160836.

The previous prime is 12647836427. The next prime is 12647836463. The reversal of 12647836457 is 75463874621.

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 12647836457 - 2¹⁶ = 12647770921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12647836399 and 12647836408.

It is not an unprimeable number, because it can be changed into a prime (12647836427) 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, 332837783 + ... + 332837820.

It is an arithmetic number, because the mean of its divisors is an integer number (3328378020).

Almost surely, 2^12647836457 is an apocalyptic number.

It is an amenable number.

12647836457 is a deficient number, since it is larger than the sum of its proper divisors (665675623).

12647836457 is an equidigital number, since it uses as much as digits as its factorization.

12647836457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665675622.

The product of its digits is 6773760, while the sum is 53.

The spelling of 12647836457 in words is "twelve billion, six hundred forty-seven million, eight hundred thirty-six thousand, four hundred fifty-seven".