12756402643 has 4 divisors (see below), whose sum is σ = 13101170320. Its totient is φ = 12411634968.

The previous prime is 12756402641. The next prime is 12756402649. The reversal of 12756402643 is 34620465721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34620465721 = 121007 ⋅286103.

It is a cyclic number.

It is not a de Polignac number, because 12756402643 - 2¹ = 12756402641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12756402596 and 12756402605.

It is not an unprimeable number, because it can be changed into a prime (12756402641) 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, 172383783 + ... + 172383856.

It is an arithmetic number, because the mean of its divisors is an integer number (3275292580).

Almost surely, 2^12756402643 is an apocalyptic number.

12756402643 is a deficient number, since it is larger than the sum of its proper divisors (344767677).

12756402643 is an equidigital number, since it uses as much as digits as its factorization.

12756402643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344767676.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 12756402643 in words is "twelve billion, seven hundred fifty-six million, four hundred two thousand, six hundred forty-three".